Re: [ccp4bb] Normalization of B-factors

2018-08-10 Thread Daniel M. Himmel, Ph. D.
Just be careful when drawing conclusions from B-factors. If you look at the mathematical way that a B-factor modifies a structure factor, you can see that as a B-factor's numerical value increases, the corresponding structure factor's contribution to a calculated diffraction pattern is reduced. I

Re: [ccp4bb] Normalization of B-factors

2018-08-09 Thread Ethan Merritt
On Thursday, 09 August 2018 10:45:07 Pavel Afonine wrote: > > I (personally) think the best answer from these was to look at the > > TLS-subtracted residuals (ie. total B-factor - TLS component) — can’t > > remember who sent it, off the top of my head. > > > > TLS is just an approximation, sometim

Re: [ccp4bb] Normalization of B-factors

2018-08-09 Thread Pavel Afonine
> I (personally) think the best answer from these was to look at the > TLS-subtracted residuals (ie. total B-factor - TLS component) — can’t > remember who sent it, off the top of my head. > TLS is just an approximation, sometimes good and sometimes not. If TLS parameters are refined along with in

Re: [ccp4bb] Normalization of B-factors

2018-08-09 Thread Pearce, N.M. (Nick)
Hi, A quick search of the CCP4BB archive reveals a couple of previous conversations on this topic. I’ll link them here to save repetition — reading through should give you a pretty good idea: https://www.mail-archive.com/ccp4bb@jiscmail.ac.uk/msg42526.html https://www.mail-archive.com/ccp4bb@ji

Re: [ccp4bb] Normalization of B-factors

2018-08-09 Thread Eleanor Dodson
I wouldnt have thought so. There is a B factor plot as part of CCP4I2 - does that show any pattern of differences between ligand and environ,ment? Eleanor On 9 August 2018 at 10:54, Santhosh Gatreddy wrote: > Hi all, > > I have to compare the B-factors of three of my ligand bound structures of