Re: [ccp4bb] determination of oligomerization state of protein

2012-08-14 Thread Faisal Tarique
Hi you can also try dynamic light scattering of different fraction of the peak.it will help you to know the exact molecular size of individual peak..glutaraldehyde crosslinking is also a good option..increasing the concentration of protein may shift the equilibrium in the direction of higher

[ccp4bb] Optimizing xtals conditions

2012-08-14 Thread Harman, Christine
Hi all, I need some advice on reproducing crystals that emerged in about 2 months from a screen. The background is I set up a 96-well hangdrop screen and checked the tray after 1 week and then every 2-3day for about 3 weeks. I did notice that this particular drop seemed very dynamic overtime.

Re: [ccp4bb] Optimizing xtals conditions

2012-08-14 Thread Ho Leung Ng
Hello Christine, First, you want to make sure those crystals are not salt. Crystals that appear only after a very long time are often salt crystals that form as your drop dries out. Check diffraction to see if it's the real thing before you invest time optimizing crystallization. Ho Ho

Re: [ccp4bb] Problem with Coot on Mountain Lion

2012-08-14 Thread Wataru Kagawa
Hi Jinyi, Do you have two versions of python installed? Maybe executing fink remove python will solve the problem (?) Wataru

Re: [ccp4bb] Optimizing xtals conditions

2012-08-14 Thread Yuri Pompeu
Shoot the existing crystals. Who says you will need optmization? lol

[ccp4bb] postdoctoral position in structural biology of microtubule regulators

2012-08-14 Thread ANTONINA ROLL-MECAK
A Postdoctoral position is available in the Cell Biology and Biophysics Unit headed by Dr. Antonina Roll-Mecak at the National Institute of Neurological Disorders and Stroke to study the structure and mechanism of tubulin post-translational modification enzymes. The Roll-Mecak Laboratory

[ccp4bb] phaser with MR------search ensemble

2012-08-14 Thread 李华
Dear ccp4er, I try to use Phaser MR to solve a structure. A mtz file from oasis was used as a ensemble. All of the parameters containing protein MW, nucleic acid MW, extent of X, Y, Z and center of X, Y, Z and RMS error were assigned. However, when I ran phaser mr, the program complain