Re: [ccp4bb] iMosflm in 6.1 under OS X

2008-12-17 Thread William G. Scott
I've just now added these as fink packages (cvs unstable).  Sorry for  
the delay. I dropped the ball.


 Steffen Schmidt did the hard work, so many thanks to Seffen!!!

Bill



On Dec 17, 2008, at 7:56 AM, Andrzej Lyskowski wrote:


Hi,

I've just upgraded my fink distro and was wondering what else has to  
be done concerning configuration in order to make the iMosflm run on  
Mac OS.

So far I'm getting the following error:

Error in startup script: unknown namespace in import pattern itcl::*
   while executing
namespace import itcl::*
   (file /sw/share/xtal/ccp4-6.1.0/ccp4i/imosflm/src/imosflm.tcl  
line 91)

   invoked from within
source $env(IMOSFLM)
   (file /sw/share/xtal/ccp4-6.1.0/ccp4i/imosflm/imosflm.tcl line  
111)


Regards, Andrzej


Re: [ccp4bb] iMosflm in 6.1 under OS X

2008-12-17 Thread William G. Scott

More specifically, issue

fink selfupdate-cvs  (or fink selfupdate-rsync)
fink install  itcl itk iwidgets tdom tkimg tktreectrl




On Dec 17, 2008, at 7:56 AM, Andrzej Lyskowski wrote:


Hi,

I've just upgraded my fink distro and was wondering what else has to  
be done concerning configuration in order to make the iMosflm run on  
Mac OS.

So far I'm getting the following error:

Error in startup script: unknown namespace in import pattern itcl::*
   while executing
namespace import itcl::*
   (file /sw/share/xtal/ccp4-6.1.0/ccp4i/imosflm/src/imosflm.tcl  
line 91)

   invoked from within
source $env(IMOSFLM)
   (file /sw/share/xtal/ccp4-6.1.0/ccp4i/imosflm/imosflm.tcl line  
111)


Regards, Andrzej


Re: [ccp4bb] iMosflm in 6.1 under OS X

2008-12-17 Thread Harry Powell

Hi

I should say, while this subject has been brought up, that Luke and I  
are working hard to remove many of these dependencies, so iMosflm  
should work with a more plain vanilla version of TclTk (but you will  
still need iTcl and iTk.


On 17 Dec 2008, at 16:34, William G. Scott wrote:


More specifically, issue

fink selfupdate-cvs  (or fink selfupdate-rsync)
fink install  itcl itk iwidgets tdom tkimg tktreectrl




On Dec 17, 2008, at 7:56 AM, Andrzej Lyskowski wrote:


Hi,

I've just upgraded my fink distro and was wondering what else has  
to be done concerning configuration in order to make the iMosflm  
run on Mac OS.

So far I'm getting the following error:

Error in startup script: unknown namespace in import pattern  
itcl::*

  while executing
namespace import itcl::*
  (file /sw/share/xtal/ccp4-6.1.0/ccp4i/imosflm/src/imosflm.tcl  
line 91)

  invoked from within
source $env(IMOSFLM)
  (file /sw/share/xtal/ccp4-6.1.0/ccp4i/imosflm/imosflm.tcl line  
111)


Regards, Andrzej


Harry
--
Dr Harry Powell, MRC Laboratory of Molecular Biology, MRC Centre,  
Hills Road, Cambridge, CB2 0QH


Re: [ccp4bb] O/T: microscopes

2008-12-17 Thread Jens T. Kaiser
I can only recommend the Motic microscopes. i'm very impressed for $1,70O incl 
camera, not as sturdy as Leica (my favorite) but very good image quality. 
Drawback: no cold light source. But you can get a gooseneck light and do top 
illumination. Do not buy their polarizer, though.

Cheers,

Jens




n Wednesday 17 December 2008 07:34:31 Uwe Mueller wrote:
 Dear Clint,
 Jerome is right. Do not expect to get a stereo microscope (these are
 more or less two microscopes within a smart arrangement) for this price.
 We purchased recently a Leica M205A, which defines the quality and price
 for a high-end system. It has a magnification range using a 0.8 plan
 objective and 10x oculars of 6-160x at a working distance of 90mm. The
 price for the objective alone is around 3000 US$, the full system with a
 CCD camera and the Leica application suite software cost then 13x more
 then you are expecting.
 Best regards,
 Uwe

 mesters wrote:
  The combination of for example 10-120x stereo-zoom magnification, good
  optical quality, bright- and dark-field illumination,
  and only 3000 US$ is NOT possible unless:
 
  1) you are willing to buy a second hand of quality brands like Leica,
  Zeiss, Olympus or Nikon (my preference)
  2) you buy a low quality brand and you will later regret having done
  that .
 
  My two cents of advice, go for a SECOND HAND or, get more funding i.e.
  at least triple the amount
 
  - J. -
 
  Clint Spiegel wrote:
  Hi,
 
  I am looking to buy a modestly-priced zoom scope for x-ray
  crystallographic purposes ($2-3000).  Does anyone have suggestions about
  what/where to possibly find this?  I currently have a cheap one that
  goes
  from 7.5-50X, but I'd like something with a little more magnification, a
  better light source and better optics.
 
  Thanks,
  Clint
 
 
  Clint Spiegel
  Assistant Professor, Chemistry
  Western Washington University
  516 High Street
  Bellingham, WA 98225-9150.



-- 
+-+-+
| Dr. Jens T. Kaiser  | Office: +1(626)395-2662 |
| California Institute of Technology  | Lab:+1(626)395-8392 |
| m/c 114-96  | Cell:   +1(626)379-1650 |
| Pasadena, CA 91125, USA | Email:  kai...@caltech.edu  |
+-+-+


[ccp4bb] Postdoctoral position in Edinburgh

2008-12-17 Thread Laura Spagnolo

I would like to draw your attention to the following opening:

Vacancy Reference 3010245

Applications are invited for a Post-doctoral position funded by Cancer  
Research UK, to work on structure/function studies of the NMD  
machinery in Dr Laura Spagnolo's group. Applicants must hold a PhD in  
a biological science. Innovative thinking, strong motivation and  
experience in molecular biology, protein expression and purification  
are essential. Previous experience in crystallisation and X-ray  
crystallography and/or electron microscopy coupled to single particle  
analysis would be considered an advantage.


Informal enquiries at the address lspag...@staffmail.ed.ac.uk are  
welcome. Applications at web address:  
http://www.jobs.ed.ac.uk/vacancies/index.cfm?fuseaction=vacancies.detailvacancy_ref=3010245


Best regards,
Laura




--
Dr Laura Spagnolo
Institute of Structural Molecular Biology
Room 702/705, Darwin Building
King's Buildings
Mayfield Road
University of Edinburgh
Edinburgh EH9 3JR
United Kingdom
Mobile: (0)7793 018 625

From 05/01/2009:
T: +44 (0)131 650 7066
F: +44 (0)131 650 8650



--
The University of Edinburgh is a charitable body, registered in
Scotland, with registration number SC005336.


[ccp4bb] O/T: use of heparin in crystallisation

2008-12-17 Thread Chen, Yu Wai

Dear All,

Does anybody has any comment on using heparin as an additive to 
co-crystallise an RNA-binding protein?  I am not asking about using it 
to form a complex with proteins that are know to bind heparin 
specifically, but using it as a general RNA analogue, when we lack the 
knowledge of the RNA target sequence.


Thanks a lot.

Wai

--
Yu Wai Chen, PhDLecturer
King's College London, Randall Division +44-207-848-8206
New Hunt's House, Guy's Campus, London SE1 1UL, U.K.


Re: [ccp4bb] iMosflm in 6.1 under OS X

2008-12-17 Thread Engin Ozkan
By the way, is anyone experiencing the following problem with 
fink-installed coot?


dyld: Library not loaded: /usr/X11/lib/libXdamage.1.dylib
 Referenced from: /sw/bin/coot
 Reason: Incompatible library version: coot requires version 3.0.0 or 
later, but libXdamage.1.dylib provides version 2.0.0


[1]Trace/BPT trapcoot

Engin

William G. Scott wrote:

More specifically, issue

fink selfupdate-cvs  (or fink selfupdate-rsync)
fink install  itcl itk iwidgets tdom tkimg tktreectrl




On Dec 17, 2008, at 7:56 AM, Andrzej Lyskowski wrote:


Hi,

I've just upgraded my fink distro and was wondering what else has to 
be done concerning configuration in order to make the iMosflm run on 
Mac OS.

So far I'm getting the following error:

Error in startup script: unknown namespace in import pattern itcl::*
   while executing
namespace import itcl::*
   (file /sw/share/xtal/ccp4-6.1.0/ccp4i/imosflm/src/imosflm.tcl 
line 91)

   invoked from within
source $env(IMOSFLM)
   (file /sw/share/xtal/ccp4-6.1.0/ccp4i/imosflm/imosflm.tcl line 111)

Regards, Andrzej


[ccp4bb] XAS software

2008-12-17 Thread Eugenio De la Mora
Hi,
I have some XAS spectra but I'm new in the area. I'm looking for a free 
software. I just want to normalize the data and compare between them. Any 
suggestion?

Thank you very much.

Eugenio De la Mora
Insituto de Biotecnologia, UNAM.


Re: [ccp4bb] iMosflm in 6.1 under OS X

2008-12-17 Thread Engin Ozkan
Yep, this happened because of the latest Mac OS 10.5.6 update. With the 
update, my X11 version got downgraded from 2.3.1 to 2.1.5.


Engin

William G. Scott wrote:

Hi Engin:

What do you get in response to the command

otool -L /usr/X11/lib/libXdamage.1.dylib | grep libXdamage.1.dylib

You should see

 /usr/X11/lib/libXdamage.1.dylib (compatibility version 3.0.0, current 
version 3.0.0)


If you don't, update X11 here (free) to at least 2.3.1:

http://xquartz.macosforge.org/trac/wiki

If you do see what I do, then I suspect you need to unset the evil 
$DYLD_LIBRARY_PATH  variable



Bill



On Dec 17, 2008, at 1:53 PM, Engin Ozkan wrote:

By the way, is anyone experiencing the following problem with 
fink-installed coot?


dyld: Library not loaded: /usr/X11/lib/libXdamage.1.dylib
Referenced from: /sw/bin/coot
Reason: Incompatible library version: coot requires version 3.0.0 or 
later, but libXdamage.1.dylib provides version 2.0.0


[1]Trace/BPT trapcoot

Engin

William G. Scott wrote:

More specifically, issue

fink selfupdate-cvs  (or fink selfupdate-rsync)
fink install  itcl itk iwidgets tdom tkimg tktreectrl




On Dec 17, 2008, at 7:56 AM, Andrzej Lyskowski wrote:


Hi,

I've just upgraded my fink distro and was wondering what else has 
to be done concerning configuration in order to make the iMosflm 
run on Mac OS.

So far I'm getting the following error:

Error in startup script: unknown namespace in import pattern itcl::*
  while executing
namespace import itcl::*
  (file /sw/share/xtal/ccp4-6.1.0/ccp4i/imosflm/src/imosflm.tcl 
line 91)

  invoked from within
source $env(IMOSFLM)
  (file /sw/share/xtal/ccp4-6.1.0/ccp4i/imosflm/imosflm.tcl line 
111)


Regards, Andrzej




Re: [ccp4bb] iMosflm in 6.1 under OS X

2008-12-17 Thread William G. Scott

Hi Engin:

What do you get in response to the command

otool -L /usr/X11/lib/libXdamage.1.dylib | grep libXdamage.1.dylib

You should see

 /usr/X11/lib/libXdamage.1.dylib (compatibility version 3.0.0,  
current version 3.0.0)


If you don't, update X11 here (free) to at least 2.3.1:

http://xquartz.macosforge.org/trac/wiki

If you do see what I do, then I suspect you need to unset the evil  
$DYLD_LIBRARY_PATH  variable



Bill



On Dec 17, 2008, at 1:53 PM, Engin Ozkan wrote:

By the way, is anyone experiencing the following problem with fink- 
installed coot?


dyld: Library not loaded: /usr/X11/lib/libXdamage.1.dylib
Referenced from: /sw/bin/coot
Reason: Incompatible library version: coot requires version 3.0.0 or  
later, but libXdamage.1.dylib provides version 2.0.0


[1]Trace/BPT trapcoot

Engin

William G. Scott wrote:

More specifically, issue

fink selfupdate-cvs  (or fink selfupdate-rsync)
fink install  itcl itk iwidgets tdom tkimg tktreectrl




On Dec 17, 2008, at 7:56 AM, Andrzej Lyskowski wrote:


Hi,

I've just upgraded my fink distro and was wondering what else has  
to be done concerning configuration in order to make the iMosflm  
run on Mac OS.

So far I'm getting the following error:

Error in startup script: unknown namespace in import pattern  
itcl::*

  while executing
namespace import itcl::*
  (file /sw/share/xtal/ccp4-6.1.0/ccp4i/imosflm/src/imosflm.tcl  
line 91)

  invoked from within
source $env(IMOSFLM)
  (file /sw/share/xtal/ccp4-6.1.0/ccp4i/imosflm/imosflm.tcl line  
111)


Regards, Andrzej


[ccp4bb] Depositing coordinates with riding hydrogens

2008-12-17 Thread Jonathan Winger

Hi all-

Just wondering what the consensus is - should a structure refined with  
riding hydrogens be deposited with the coordinates for the hydrogens  
included?  One could argue that, since they were used in the  
refinement to obtain the model and statistics reported, they should be  
included in the deposited pdb file.  On the other hand, the presence  
of hydrogens in the pdb file might lead some to think the hydrogens  
were refined against density when they really weren't.  Thoughts?


Thanks,
Jon


Re: [ccp4bb] iMosflm in 6.1 under OS X

2008-12-17 Thread Jayashankar
Yes, William I do agree with you,

and in the same line of doubt, I have one more thing to ask you.

Where is this .cvspass resides.

I have problem in updating my fink , with fink selfupdate-cvs.
thanks

S.Jayashankar
Research Student
Institute for Biophysical Chemistry
Hannover Medical School
Germany.


On Wed, Dec 17, 2008 at 11:54 PM, William G. Scott 
wgsc...@chemistry.ucsc.edu wrote:

 Please, we all need to mention this to the Apple people.  This is totally
 unacceptable.



 On Dec 17, 2008, at 2:54 PM, Engin Ozkan wrote:

  Yep, this happened because of the latest Mac OS 10.5.6 update. With the
 update, my X11 version got downgraded from 2.3.1 to 2.1.5.

 Engin

 William G. Scott wrote:

 Hi Engin:

 What do you get in response to the command

 otool -L /usr/X11/lib/libXdamage.1.dylib | grep libXdamage.1.dylib

 You should see

 /usr/X11/lib/libXdamage.1.dylib (compatibility version 3.0.0, current
 version 3.0.0)

 If you don't, update X11 here (free) to at least 2.3.1:

 http://xquartz.macosforge.org/trac/wiki

 If you do see what I do, then I suspect you need to unset the evil
 $DYLD_LIBRARY_PATH  variable


 Bill



 On Dec 17, 2008, at 1:53 PM, Engin Ozkan wrote:

  By the way, is anyone experiencing the following problem with
 fink-installed coot?

 dyld: Library not loaded: /usr/X11/lib/libXdamage.1.dylib
 Referenced from: /sw/bin/coot
 Reason: Incompatible library version: coot requires version 3.0.0 or
 later, but libXdamage.1.dylib provides version 2.0.0

 [1]Trace/BPT trapcoot

 Engin

 William G. Scott wrote:

 More specifically, issue

 fink selfupdate-cvs  (or fink selfupdate-rsync)
 fink install  itcl itk iwidgets tdom tkimg tktreectrl




 On Dec 17, 2008, at 7:56 AM, Andrzej Lyskowski wrote:

  Hi,

 I've just upgraded my fink distro and was wondering what else has to
 be done concerning configuration in order to make the iMosflm run on Mac 
 OS.
 So far I'm getting the following error:

 Error in startup script: unknown namespace in import pattern itcl::*
  while executing
 namespace import itcl::*
  (file /sw/share/xtal/ccp4-6.1.0/ccp4i/imosflm/src/imosflm.tcl line
 91)
  invoked from within
 source $env(IMOSFLM)
  (file /sw/share/xtal/ccp4-6.1.0/ccp4i/imosflm/imosflm.tcl line 111)

 Regards, Andrzej





Re: [ccp4bb] Depositing coordinates with riding hydrogens

2008-12-17 Thread Ethan Merritt
On Wednesday 17 December 2008 15:53:42 Jonathan Winger wrote:
 Hi all-
 
 Just wondering what the consensus is - should a structure refined with  
 riding hydrogens be deposited with the coordinates for the hydrogens  
 included?  One could argue that, since they were used in the  
 refinement to obtain the model and statistics reported, they should be  
 included in the deposited pdb file.  On the other hand, the presence  
 of hydrogens in the pdb file might lead some to think the hydrogens  
 were refined against density when they really weren't.  Thoughts?

It doesn't hurt to include them, bu I don't see much point in it.
The riding-model parameters are sufficient to regenerate the hydrogen
positions.  

Of the things one might worry about not including in a PDB file,
I'm more concerned about the omission of scattering factors used
for refinement and the continuing ambiguity of the precise meaning of
the B factor reported in the ATOM record.  And I am still scratching
my head over the meaning of B factors attached to atoms with 0 occupancy.

-- 
Ethan A Merritt
Biomolecular Structure Center
University of Washington, Seattle 98195-7742


Re: [ccp4bb] Depositing coordinates with riding hydrogens

2008-12-17 Thread Pavel Afonine

Hi Jon,

- obviously, the model should not be manipulated once the final 
statistics is obtained, or if it is manipulated, then the final 
statistics must be re-calculated;


- I can't imagine someone thinking that hydrogens were refined 
individually in a X-ray structure say at 2A resolution.


- also, it's much easier to remove H atoms later on, rather than add 
them back the *exact same *way you did. I don't see any logic of making 
the depositing information artificially less complete by removing hydrogens.


Cheers,
Pavel.


On 12/17/2008 3:53 PM, Jonathan Winger wrote:

Hi all-

Just wondering what the consensus is - should a structure refined with 
riding hydrogens be deposited with the coordinates for the hydrogens 
included?  One could argue that, since they were used in the 
refinement to obtain the model and statistics reported, they should be 
included in the deposited pdb file.  On the other hand, the presence 
of hydrogens in the pdb file might lead some to think the hydrogens 
were refined against density when they really weren't.  Thoughts?


Thanks,
Jon


[ccp4bb] CCP4 6.1.0 release and CCP4MG

2008-12-17 Thread Victor Alves



  Hi

  After all v6.1.0 did arrive before Christmas :-) Thank you all.

  Still I guess Santa, after freezing in the car park, still had to  
endure beeing stuck in some chimney, as a consequence of all of us who  
wanted to grab a fresh copy, flooding poor CCP4 server. So, after 2  
days I finally wgetted my 1 Gigabyte Lin-RH8 copy for installation  
in Ubuntu.


  Even before installing, I browsed all the tarball and couldn't find  
CCP4MG? Since the documentation states it should be a separate package  
(like COOT), am I missing something? Also, if you choose a custom  
tarball, there is no option to include CCP4MG.


  Thank you

  Victor Alves

   Dear All


as we continue our journey up the A65 (towards the heart of Yorkshire)
we are pleased to announce the release of Clapham (or 6.1.0).  This is
available form the usual locations

http://www.ccp4.ac.uk/download/downloadman.php

or

ftp://ftp.ccp4.ac.uk/ccp4/6.1/

Obviously special thanks to the program authors, testers etc.  Go enjoy



Please note that the downloads are large (very large if you include the
balbes database), so there may be an issue of browsers timing out
(observed for firefox so far).

Charles Ballard

on behalf of the CCP4 team.




This message was sent using IMP, the Internet Messaging Program.



[ccp4bb] LDAO SDS-PAGE

2008-12-17 Thread Subscribe Ccp4Bb Kn L
Hello everyone...

I have a protein solubilised in 1% LDAO, 50 mM Phosphate pH 7.5, 150 mM
NaCl. When I mix it with laemmli buffer and heat at 95C, 3 mins for
SDS-PAGE, it aggregates (as in when you mix GuHCl with SDS) and can't be
loaded onto the gel.

Does anyone know why it happens? Thanks a lot!!!

Kien


Re: [ccp4bb] LDAO SDS-PAGE

2008-12-17 Thread Artem Evdokimov
Is your phosphate a Na-K phosphate? If it is, then you're probably getting a
K salt of SDS which is considerably less soluble than Na or Li salts.

Artem

-Original Message-
From: CCP4 bulletin board [mailto:ccp...@jiscmail.ac.uk] On Behalf Of
Subscribe Ccp4Bb Kn L
Sent: Wednesday, December 17, 2008 9:26 PM
To: CCP4BB@JISCMAIL.AC.UK
Subject: [ccp4bb] LDAO  SDS-PAGE

Hello everyone...

I have a protein solubilised in 1% LDAO, 50 mM Phosphate pH 7.5, 150 mM
NaCl. When I mix it with laemmli buffer and heat at 95C, 3 mins for
SDS-PAGE, it aggregates (as in when you mix GuHCl with SDS) and can't be
loaded onto the gel.

Does anyone know why it happens? Thanks a lot!!!

Kien


Re: [ccp4bb] LDAO SDS-PAGE

2008-12-17 Thread Poul Nissen
Besides the K-SDS precipitation it can also be the problem of membrane  
proteins generally having a tendency to aggregate when boiled with  
SDS. Try to just add the Laemmli buffer and load the gel without  
boiling. This is the general procedure for membrane proteins.


Poul


On 18/12/2008, at 06.20, Artem Evdokimov wrote:

Is your phosphate a Na-K phosphate? If it is, then you're probably  
getting a

K salt of SDS which is considerably less soluble than Na or Li salts.

Artem

-Original Message-
From: CCP4 bulletin board [mailto:ccp...@jiscmail.ac.uk] On Behalf Of
Subscribe Ccp4Bb Kn L
Sent: Wednesday, December 17, 2008 9:26 PM
To: CCP4BB@JISCMAIL.AC.UK
Subject: [ccp4bb] LDAO  SDS-PAGE

Hello everyone...

I have a protein solubilised in 1% LDAO, 50 mM Phosphate pH 7.5, 150  
mM

NaCl. When I mix it with laemmli buffer and heat at 95C, 3 mins for
SDS-PAGE, it aggregates (as in when you mix GuHCl with SDS) and  
can't be

loaded onto the gel.

Does anyone know why it happens? Thanks a lot!!!

Kien



Re: [ccp4bb] iMosflm in 6.1 under OS X

2008-12-17 Thread Engin Ozkan
Now that everything with coot and imosflm has been settled, how about 
sftools?  I am getting errors when I try to open an sftools window with 
ccp4i, with 6.1.0.  I get the same error with a fink-installed mac 
version, and a linux installation.  Here is the error:


bad window path name .main.canvas.contents.param_1.body
bad window path name .main.canvas.contents.param_1.body
   while executing
pack $wframe.body  -side top -fill x
   (procedure update_folder_display line 23)
   invoked from within
update_folder_display 1 sftools_PROJECT view
   invoked from within
.w_sftools_PROJECT.main.canvas.contents.param_1.top.but invoke
   (command bound to event)

Any ideas?

Engin


William G. Scott wrote:

More specifically, issue

fink selfupdate-cvs  (or fink selfupdate-rsync)
fink install  itcl itk iwidgets tdom tkimg tktreectrl




On Dec 17, 2008, at 7:56 AM, Andrzej Lyskowski wrote:


Hi,

I've just upgraded my fink distro and was wondering what else has to 
be done concerning configuration in order to make the iMosflm run on 
Mac OS.

So far I'm getting the following error:

Error in startup script: unknown namespace in import pattern itcl::*
   while executing
namespace import itcl::*
   (file /sw/share/xtal/ccp4-6.1.0/ccp4i/imosflm/src/imosflm.tcl 
line 91)

   invoked from within
source $env(IMOSFLM)
   (file /sw/share/xtal/ccp4-6.1.0/ccp4i/imosflm/imosflm.tcl line 111)

Regards, Andrzej


Re: [ccp4bb] LDAO SDS-PAGE

2008-12-17 Thread Daniela Albanesi
Hi,

you could try without heating. Just vortex your sample a few times after
adding the sample buffer and then load the gel.

good luck,

Daniela



 Is your phosphate a Na-K phosphate? If it is, then you're probably getting
 a
 K salt of SDS which is considerably less soluble than Na or Li salts.

 Artem

 -Original Message-
 From: CCP4 bulletin board [mailto:ccp...@jiscmail.ac.uk] On Behalf Of
 Subscribe Ccp4Bb Kn L
 Sent: Wednesday, December 17, 2008 9:26 PM
 To: CCP4BB@JISCMAIL.AC.UK
 Subject: [ccp4bb] LDAO  SDS-PAGE

 Hello everyone...

 I have a protein solubilised in 1% LDAO, 50 mM Phosphate pH 7.5, 150 mM
 NaCl. When I mix it with laemmli buffer and heat at 95C, 3 mins for
 SDS-PAGE, it aggregates (as in when you mix GuHCl with SDS) and can't be
 loaded onto the gel.

 Does anyone know why it happens? Thanks a lot!!!

 Kien