Re: [ccp4bb] DMMULTI question

2010-01-20 Thread Kevin Cowtan
Joe Cockburn wrote: Dear BB, We are trying to solve the structure of a complex between two proteins. We have two crystal forms of the complex, and a partial MR solution in each. We now want to average the density between these two forms to improve the maps, using DMMULTI. However, there are a cou

[ccp4bb] DMMULTI question

2010-01-20 Thread Joe Cockburn
Dear BB, We are trying to solve the structure of a complex between two proteins. We have two crystal forms of the complex, and a partial MR solution in each. We now want to average the density between these two forms to improve the maps, using DMMULTI. However, there are a couple of things I don't

Re: [ccp4bb] DMMULTI question

2009-10-16 Thread Frederic VELLIEUX
throw them away afterwards? Only use the phase information (and fom's) from averaging for the next cycle. This approach has made wonders for us again and again. Fred. > Message du 16/10/09 17:34 > De : "Pete Meyer" > A : CCP4BB@JISCMAIL.AC.UK > Copie à : > Ob

Re: [ccp4bb] DMMULTI question

2009-10-16 Thread Pete Meyer
In the first cycle DMMULTI calculates solvent masks for the two crystals. Does it continously improve these masks or stick to the initial one ? If it acts like DM, then it updates it (using default options). But on the other hand, DMMULTI doesn't appear to to support SOLMASK UPDATE keywords.

[ccp4bb] DMMULTI question

2009-10-16 Thread Peter Grey
Dear CCP4 users, I am trying to improve MR phases using multi-crystal averaging in DMMULTI. First crystal has 3 fold NCS , 5A resolution and the second crystal no NCS , 4A resolution. I ask for your advice concerning two issues ; In the first cycle DMMULTI calculates solvent masks for the two cr