Re: [ccp4bb] analytical gel filtration columns

2019-04-17 Thread Bärbel Blaum
Hi Mohinder, if you are up to trying something new the monolithic columns by Biaseparation (analytical or prep) are well suited for big molecules / particles and worked very well for me. The fittings work with the GE chromatography instruments. https://www.biaseparations.com Good luc

Re: [ccp4bb] analytical gel filtration columns

2019-04-17 Thread David Blum
Mohinder, You could also try HPLC where you should get better results due to more theoretical plates. One option would from Phenomenex. 10E6A Phase Information -- - Molecular Weight Range: 60 K - 10,000 K https://www.phenomenex.com/Products/HPLCDetail/phenogel *D

Re: [ccp4bb] analytical gel filtration columns

2019-04-17 Thread Roger Rowlett
How about BioGel-A50m with an exclusion limit of 50 million Da? I've used A15m for complexes as large as 500 kDa and it seemed to work well. __ Roger Rowlett On Wed, Apr 17, 2019, 11:11 AM Mohinder Pal wrote: > Dear all, > > I would like to gel filter a multi protein complex (1.

Re: [ccp4bb] analytical gel filtration columns

2019-04-17 Thread David Briggs
Hi Mohinder, Have you tried SEC columns like Sephacryl S-400 or CL-4B? They have a higher fractionation range than Superose 6 HTH, Dave From: CCP4 bulletin board on behalf of Mohinder Pal Sent: 17 April 2019 16:10 To: CCP4BB@JISCMAIL.AC.UK Subject: Re: [ccp4b

Re: [ccp4bb] A ccp4I2 question

2019-04-17 Thread Jan Stransky
I can comfirm, it is my favourite feature of i2. I would like to see it automated (or -able using CLI) for flawless backup recovery. Cheers, Jan On 16/04/2019 14:22, Christian Roth wrote: > yes one can > > Cheers > Christian > > On Tue, Apr 16, 2019 at 1:19 PM Eleanor Dodson > <176a9d5ebad7

Re: [ccp4bb] analytical gel filtration columns

2019-04-17 Thread Mohinder Pal
Dear all, I would like to gel filter a multi protein complex (1.4MDa) as the final purification step. I have tried tandem Superose 6 columns and this complex elutes close to void volume as it is a very elongated molecule. I was wondering if someone could suggest different analytical columns fo

Re: [ccp4bb] naive question how to add GTP as a residue to a nucleic acid chain and refine!

2019-04-17 Thread Almudena Ponce Salvatierra
Hi Phoebe, that actually worked! thank you very much! Best, Almudena El mar., 16 abr. 2019 a las 20:32, Phoebe A. Rice () escribió: > At least last fall, the state of the art for getting your T7-transcribed > RNA to start with a triphosphate in phenix was to add this file (edited for > your ch

Re: [ccp4bb] High Rfree in last Shell

2019-04-17 Thread Randy Read
Hi, No-one else seems to have said this, but just from the data in that table, if I were a referee I would almost certainly be asking why you seem to have discarded useful data at higher resolution than 3.1A! Best wishes, Randy Read > On 16 Apr 2019, at 20:59, Jan van Agthoven wrote: > > De

Re: [ccp4bb] High Rfree in last Shell

2019-04-17 Thread Mark J van Raaij
Send your manuscripts to any of the IUCr journals! Might still get the occasional referee like that, but the editors should ignore those comments. plus you'd be supporting a scientific society [sorry for the advert...] Mark J van Raaij Dpto de Estructura de Macromoleculas Centro Nacional de Biot