Re: [ccp4bb] twin, pseudosymmetry and NCS in P2/C2 ?

2023-03-21 Thread Jessica Bruhn
Hi Gianluca, Have you checked for diffraction anisotropy problems? It might be worth running it through the STARANISO webserver: https://staraniso.globalphasing.org/cgi-bin/staraniso.cgi. Anisotropy can make your data look twinned and elliptical truncation can help improve maps. Good luck!

Re: [ccp4bb] Regarding the diffraction image

2023-02-03 Thread Jessica Bruhn
Hi Kavya, As others have mentioned, the unit cell is too small to contain your protein. With a volume of ~4820 Ang^3, the unit cell can contain at most ~268 atoms, excluding hydrogens (divide the volume by 18 to get this number). If the symmetry is P3, then the asymmetric unit can only contain

Re: [ccp4bb] Question about CCP4 monomer dictionaries

2022-11-28 Thread Jessica Bruhn
Hi Steve, You could cite this book: Müller, P., Herbst-Irmer, R., Spek, A.L., Schneider, T.R., and Sawaya M.R. (2007) Crystal Structure Refinement: A Crystallographer's Guide to SHELXL. IUCr Texts on Crystallography. J Am Chem Soc. 129, 451–451. It also lists the expected bond length for a

Re: [ccp4bb] Quantifying electron density inside of a given volume

2022-08-15 Thread Jessica Bruhn
Hi all, There are lots of great suggestions in this thread. I will just add a little trick from small molecule crystallography: when trying to estimate how many atoms can fit in a given volume, you can use the Rule of 18. Take the volume of interest in Angstroms^3 and divide it by 18 Angstroms^3.

Re: [ccp4bb] [EXTERNAL] Re: [ccp4bb] Comparing two datasets

2022-07-26 Thread Jessica Bruhn
Hi Mirek, I have absolutely loved this discussion of other options for comparing datasets! But to your original problem: To tell CCP4 where r is installed, you need to add this to your $PATH. You will want to figure out where r is installed on your computer and then add it to your .bashrc file

Re: [ccp4bb] [EXTERNAL] Re: [ccp4bb] SHELXD - Limit Number of CPUs?

2022-03-17 Thread Jessica Bruhn
pects the environment variable OMP_NUM_THREADS. > > Best, > Tim > > On Wed, 16 Mar 2022 17:21:38 -0700 Jessica Bruhn > <450e5de75376-dmarc-requ...@jiscmail.ac.uk> wrote: > > > Hi all, > > > > I am wondering if there is a way to limit the number of CP

[ccp4bb] SHELXD - Limit Number of CPUs?

2022-03-16 Thread Jessica Bruhn
along with other jobs and don't want to get myself into trouble. Thanks so much! Best, Jessica -- Jessica Bruhn, Ph.D Scientific Group Leader, MicroED NanoImaging Services, Inc. 4940 Carroll Canyon Road, Suite 115 San Diego, CA 92121 Phone #: (888) 675-8261 www.nanoimagingservices.com

[ccp4bb] Job Openings - Small Molecule Crystallographer (MicroED) and Scientific Programmer

2021-06-24 Thread Jessica Bruhn
#Scientific_Programmer_I Inquiries can be sent to recruit...@nimgs.com or me directly. Kind regards, Jessica -- Jessica Bruhn, Ph.D Principal Scientist NanoImaging Services, Inc. 4940 Carroll Canyon Road, Suite 115 San Diego, CA 92121 Phone #: (888) 675-8261 www.nanoimagingservices.com

Re: [ccp4bb] Contagious, Self-Distributing "Vaccines?"

2021-02-18 Thread Jessica Bruhn
Hello, There have been some really excellent points raised by others (informed consent, feasibility, etc), but I would like to share a story about another time humans tried to release a virus on a wild population in order to further an arguably noble goal: In the 1850s European rabbits were

Re: [ccp4bb] Challenging Molecular Replacement

2021-02-16 Thread Jessica Bruhn
lick the following link: >> https://www.jiscmail.ac.uk/cgi-bin/WA-JISC.exe?SUBED1=CCP4BB=1 >> > > > -- > Sharan Karade > Postdoc-fellow > IBBR-UMD, 9600 Gudelsky Dr, > Rockville >

Re: [ccp4bb] [Resolved] Re: [xds] how to specify measuring angle

2020-10-21 Thread Jessica Bruhn
il.ac.uk/CCP4BB, a > mailing list hosted by www.jiscmail.ac.uk, terms & conditions are > available at https://www.jiscmail.ac.uk/policyandsecurity/ > > ---------- > > To unsubscribe from the CCP4BB list, click the following link: > https://www.jiscmail.ac.uk/cgi-bin/WA-JISC.exe?

Re: [ccp4bb] [xds] how to specify measuring angle

2020-10-09 Thread Jessica Bruhn
> > To unsubscribe from the CCP4BB list, click the following link: > https://www.jiscmail.ac.uk/cgi-bin/WA-JISC.exe?SUBED1=CCP4BB=1 > > This message was issued to members of www.jiscmail.ac.uk/CCP4BB, a > mailing list hosted by www.jiscmail.ac.uk, terms & conditions are > av

Re: [ccp4bb] Does MicroED (microcrystal electron diffraction) have phase problem ?

2020-08-17 Thread Jessica Bruhn
ystals, or only micro-3D crystals? > > On 08/15/2020 10:40 PM, Jessica Bruhn wrote: > > Hi Alex, > > > > Welcome to the field of microED! From a practical standpoint, microED > also suffers from the phase problem, and somewhat moreso compared to X-ray > crystallography beca

Re: [ccp4bb] Does MicroED (microcrystal electron diffraction) have phase problem ?

2020-08-15 Thread Jessica Bruhn
es NOT suffer from phase problem? How about single > particle cryo electron microscopy, it should NOT have phase problem, right? > > Thanks for any input in it. > > Best, > Alex > > -- > > To unsubscribe from the CCP4BB list, click the following l

Re: [ccp4bb] Structural Importance of Methionine

2020-08-07 Thread Jessica Bruhn
-JISC.exe?SUBED1=CCP4BB=1 > <https://urldefense.proofpoint.com/v2/url?u=https-3A__www.jiscmail.ac.uk_cgi-2Dbin_WA-2DJISC.exe-3FSUBED1-3DCCP4BB-26A-3D1=DwMFaQ=WO-RGvefibhHBZq3fL85hQ=zarhu_AFfXHIr7BLs8GQXPvC2gpkmnikRXKYvnCJnk0=FpV2vp6oO-Ox53M7Ncww74udjlwJMJXwqJ_i-3DFZv4=gmuTxUEHrZ6ZtiOB-dDVGLU

Re: [ccp4bb] AW: [EXTERNAL] chirality with electron diffraction

2020-07-20 Thread Jessica Bruhn
X-ray Structure Analysis Faculty of Chemistry > > University of Vienna > > > > Phone: +43-1-4277-70202 > > > > GPG Key ID = A46BEE1A > > > > -- > -- > Tim Gruene > Head of the Centre for X-ray Structure Analysis Faculty of Chemistry > University o

Re: [ccp4bb] Quote source inquiry

2020-07-17 Thread Jessica Bruhn
aints to the lattice type. > > Refmac5 can also refine the unit cell parameters (Max Clabbers has > made use of this feature), but as far as I understand, refmac5 > only scales the unit cell volume isotropically - I am happy to be > corrected. > > When you resolution is quit

Re: [ccp4bb] Quote source inquiry

2020-07-16 Thread Jessica Bruhn
the following link: > > https://www.jiscmail.ac.uk/cgi-bin/WA-JISC.exe?SUBED1=CCP4BB=1 > > > > This message was issued to members of www.jiscmail.ac.uk/CCP4BB, a > > mailing list hosted by www.jiscmail.ac.uk, terms & conditions are > > available at https://www.jiscmail.ac.

Re: [ccp4bb] Question about small molecule crystallography

2020-06-02 Thread Jessica Bruhn
ention to be bound to any legally-binding agreement or > contract.] > > -- > > To unsubscribe from the CCP4BB list, click the following link: > https://www.jiscmail.ac.uk/cgi-bin/webadmin?SUBED1=CCP4B

[ccp4bb] Strange Pseudosymmetry Effects

2020-05-27 Thread Jessica Bruhn
these weak reflections along k hinting at a doubling of the b axis? Thanks in advance! Best, Jessica -- Jessica Bruhn, Ph.D Principal Scientist NanoImaging Services, Inc. 4940 Carroll Canyon Road, Suite 115 San Diego, CA 92121 Phone #: (888) 675-8261 www.nanoimagingservices.com

Re: [ccp4bb] Low Solvent B Factors

2016-06-02 Thread Jessica Bruhn
, it is maybe not a surprise that the solvent B factors > appear weird. > > best wishes, > > Kay > > On Wed, 1 Jun 2016 20:48:41 +, Jessica Bruhn <jbr...@scripps.edu> wrote: > >> I was wondering if anyone had any explanations or tips for fixing things.