Hi Jacob,
Keep regular drops and run a cat whisker through the drops after 4 - 5 hours.
You should have small crystals within 6-10 hrs. If they are still large, use
higher protein concentration or precipitant.
Kind regards
Mathews
-Original Message-
From: CCP4 bulletin board [mailto:
Most likely you have a reasonable pressure differential in some spot -
somewhere in the system air bubbles get compressed (and dissolved) under
high pressure, then the pressure drops as you reach the column, and the
bubbles re-form. This may not happen with water due to lower viscosity or
perhaps l
Dear Crystallogrphers,
does anybody here know a protocol to get consistently well-diffracting but
smaller, ~50um, cryoprotect(ed/able) lysozyme crystals?
Thanks,
Jacob Keller
***
Jacob Pearson Keller
Northwestern University
Medical Scientist Training P
Hello All,
I own a Bio-Rad Duoflow system for almost a year. The machine lived
up to some of the recommendations I saw on this board. However, there
is this annoying problem with air bubbles entering columns and I
cannot figure out the source. The system would be free of any air
bubbles in th
Dear friends,
(for EZRA) On the first hand .cv a cns file writtenout as an output by
xdsconv from .hkl as an input file.
Am working with a mad dataset collected at two diff wavelenght.
sure i will try the other two mentioned by P.H. Zwart and Mitch.
thanks
On Thu, Jul 3, 2008 at 9:26 PM, Mill
If you have phenix installed, you may also try:
phenix.cns_as_mtz cns_file.cv
http://www.phenix-online.org/documentation/reflection_file_tools.htm
Regards,
Debanu.
-Original Message-
From: CCP4 bulletin board [mailto:[EMAIL PROTECTED] On Behalf Of Miller,
Mitchell D.
Sent: Thursday, J
You could also try cns2mtz?
http://www.ysbl.york.ac.uk/~cowtan/cns2mtz/cns2mtz.html
Regards,
Mitch
-Original Message-
From: CCP4 bulletin board [mailto:[EMAIL PROTECTED] On Behalf Of Ezra Peisach
Sent: Thursday, July 03, 2008 11:28 AM
To: CCP4BB@JISCMAIL.AC.UK
Subject: Re: [ccp4bb] Param
I do not know off hand what a .cv file is - unless it is a cns/xplor
reflection file. Instead of using f2mtz - try sftools.
Ezra
Jayashankar wrote:
Dear scientists and friends,
When I try to convert a .cv file to .mtz by f2mtz I got the following
error,what it means ans what should I do to
Yes, I was maybe too positive in my reply. Looking more closely,
classical MD may not be appropriate here. The better way is QM/MM but
that is not quick and dirty. It depends whether the main effect of the
mutations is in the geometry of the protein or in the electronic
structure of the metal bindi
Dear scientists and friends,
When I try to convert a .cv file to .mtz by f2mtz I got the following
error,what it means ans what should I do to get rid of it.
''Parameter MAXSAVE exceeded''
--
S.Jayashankar
Research Student
Institute for Biophysical Chemistry
Hannover Medical School
Germany
Just a word of warning regarding metals in macromolecular simulation.
There is no 'good' way of modeling protein-metal interactions in many
cases. Some metal ions are very polarizable (Ca 2+ being one example)
and the simple mechanics used in protein simulation don't allow for
this. Even using a po
GROMACS binaries are available for Macs
http://www.gromacs.org/content/view/32/100/
Afaic, GROMACS is user-friendly. There are good tutorials, and there is
even third-party GUI:
http://resal.atspace.com/grogui.htm
IMHO, the GUI is not much better than running Gromacs jobs from command
line, bu
Gromacs www.gromacs.org
It is GPL. It can certainly handle metals, although as is always the
case, you have to be careful in the choice of force field. It is fairly
user friendly (by the standards of that field ;-). Not sure what the
situation is for Macs but certainly runs well on Linux.
Alter
Hi everyone.
I have a slightly off topic question I hope someone can help with.
I have a structure of a wild type domain, which binds metal ions.
Certain mutations in chelating residues cause changes in the apparent
affinity for said metal ions.
As I have (so far) failed to crystallise the mutan
Dear Francois Remacle,
One example images for the mar225 is available under:
http://www.mx.bessy.de/temp_stuff/mar225_5_theta_1_001.img.bz2
The output for this image using DiffractionImage library looks like this
(using the function listed below):
DEBUG OUTPUT ===
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