Re: [ccp4bb] high TFZ score but 50% of Rfree

2017-11-17 Thread Diana Tomchick
Do the following. 1) Perform density modification (NCS averaging and solvent flattening) 2) Run the new phases through a model building program (Buccaneer works for all resolutions, Arp/wArp works well for better than ~2.7 Å or better resolution) If this doesn’t give you a better quality model

Re: [ccp4bb] high TFZ score but 50% of Rfree

2017-11-17 Thread Phil Jeffrey
R=50% at a resolution of 2.2 Å is a lot different to 50% at, say, 3.5 Å resolution. What happens if you refine it at 3.0 or 3.5 Å ? What's the model vs sequence % identity ? Phil Jeffrey Princeton On 11/17/17 3:23 PM, Yue Li wrote: Dear all, I have several datasets (one best resolution

[ccp4bb] high TFZ score but 50% of Rfree

2017-11-17 Thread Yue Li
Dear all, I have several datasets (one best resolution reaching 2.2A), giving C2 space group, two molecules in an asymmetry unit (65.1% of solvent content).  When running MR using a template (<20% sequence identify to the target molecule), I got a solution with high TFZ (23.7) and LLG (842).