[ccp4bb] Refmac5, error

2010-11-21 Thread U Sam
Dear Everybody, it would have been nice to know how to overcome the following error of Refmac5 refinement (both for Rigidbody and Restrainst) C:/Ccp4Temp/CCP4/DepositFiles/unknown/unknown061110:19:35:08.refmac has no associated file name $$ Open failed: Unit: 9, File:

Re: [ccp4bb] expression of Cys-rich small protein

2010-11-21 Thread Guenter Fritz
Hi Laurie, nuclear protein, cysteines, my thumbs prickle it might be a zinc-binding protein. Although 12 Cys per 257 aa is not yet that much. If you have always DTT present oxidation should be no problem. Reconstitution of zinc sites can be very tricky and is not straightforward. Also E.coli