Re: [ccp4bb] [3dem] 3dem Digest, Vol 151, Issue 9

2020-03-08 Thread Alexis Rohou
Hi Pawel, Yes, agreed on that last point... grain of salt etc. Still, just because something is pretty much correct for most happy cases doesn't mean we should stop trying to get it right even for the edge cases, does it? Thanks for pointing us to your confidence interval, which I now realize I

Re: [ccp4bb] [3dem] Which resolution?

2020-03-08 Thread Frank Von Delft
Belatedly, but since the thread is still alive: Thank you Colin for answering my request - super informative, as were the later posts on B-factor and sharpening. It all reinforces my prejudice: we need to turn to interpretability, i.e. the next step (modelling), to inform the question of

Re: [ccp4bb] [3dem] Which resolution?

2020-03-08 Thread Alexis Rohou
Hi Colin, It sounds to me like you are mostly asking about whether 1/2-bit is the "correct" target to aim for, the "correct" criterion for a resolution claim. I have no view on that. I have yet to read Randy's work on the topic - it sounds very informative. What I do have a view on is, once one

Re: [ccp4bb] [3dem] Which resolution?

2020-03-08 Thread Dale Tronrud
Just a note: James Holton said "true B-factor" not "true B-factors". I believe he was talking about the overall B not the individual B's. Dale Tronrud On 3/8/2020 3:25 PM, Rangana Warshamanage wrote: > Sorry for not being clear enough. > If B-factors at the end of refinement are the "true

Re: [ccp4bb] [3dem] Which resolution?

2020-03-08 Thread Rangana Warshamanage
Sorry for not being clear enough. If B-factors at the end of refinement are the "true B-factors" then they represent a true property of data. They should be good enough to assess the model quality directly. This is what I meant by B factor validation. However, how far are the final B-factors

Re: [ccp4bb] [3dem] Which resolution?

2020-03-08 Thread Ethan A Merritt
On Sunday, 8 March 2020 01:08:32 PDT Rangana Warshamanage wrote: > "The best estimate we have of the "true" B factor is the model B factors > we get at the end of refinement, once everything is converged, after we > have done all the building we can. It is this "true B factor" that is a >

[ccp4bb] Job opening in biological sciences at Berkeley Lab

2020-03-08 Thread Corie Ralston
Hi everyone, We have a new job opening in the Molecular Foundry at Berkeley Lab. Please forward as appropriate: Job Description Berkeley Lab's Molecular Foundry has an exciting opportunity for a technical staff position in the biological sciences. This person will work with staff and users of

Re: [ccp4bb] [3dem] Which resolution?

2020-03-08 Thread Kay Diederichs
we can use model B factors to validate structures - see Analysis and validation of macromolecular B values R. C. Masmaliyeva and G. N. Murshudov Acta Cryst. (2019). D75, 505-518 https://doi.org/10.1107/S2059798319004807 HTH Kay On Sun, 8 Mar 2020 09:08:32 +, Rangana Warshamanage wrote:

Re: [ccp4bb] [3dem] Which resolution?

2020-03-08 Thread Rangana Warshamanage
"The best estimate we have of the "true" B factor is the model B factors we get at the end of refinement, once everything is converged, after we have done all the building we can. It is this "true B factor" that is a property of the data, not the model, " If this is the case, why can't we use