[ccp4bb] Unknown electron density

2023-04-19 Thread Betty Chu
Dear CCP4BB, I am working on a structure refinement and came across a blob of density that looks like an anvil (see link). Has anyone seen this before and have an idea of what it is? https://drive.google.com/file/d/1BGNwV3MujYjrV4W5m1bh3_WWd49RhJ1w/view?usp=sharing The protein is in potassium p

Re: [ccp4bb] AW: [ccp4bb] Unknown positive electron density

2017-08-24 Thread Betty Chu
king at your pictures, as far as is possible without the ability to >> rotate them, I would try to fit deoxyribose-phosphate, or even a complete >> nucleotide. Maybe your prep contained some unreacted nucleotides and your >> anomalous peak is phosphorus. >> >> >>

Re: [ccp4bb] Unknown positive electron density

2017-08-21 Thread Betty Chu
rgy? Would you expect > significant anomalous diffraction from As at this wavelength? > > On Aug 21, 2017, at 11:37 AM, Betty Chu wrote: > > Hi Shailesh, > > When I modelled in the Barium ion with octahedrally coordinated waters and > ran the refinement, the distances fro

Re: [ccp4bb] Unknown positive electron density

2017-08-21 Thread Betty Chu
Kumar Tripathi, > Phone: 9686289668 > > > On Mon, Aug 21, 2017 at 9:17 PM, Betty Chu wrote: > >> Yes, I have. The cacodylate ion does not fit well into the density. >> >> On Mon, Aug 21, 2017 at 11:44 AM, Pradeep Pallan > > wrote: >> >>> Did you

Re: [ccp4bb] Unknown positive electron density

2017-08-21 Thread Betty Chu
Yes, I have. The cacodylate ion does not fit well into the density. On Mon, Aug 21, 2017 at 11:44 AM, Pradeep Pallan wrote: > Did you try modelling in a cacodylate ion (CH3)2AsO2-? > > On Mon, Aug 21, 2017 at 10:19 AM, Betty Chu wrote: > >> Dear ccp4bb, >> >> I am

[ccp4bb] Unknown positive electron density

2017-08-21 Thread Betty Chu
BaCl2, and 30 mM NaCaC pH 6.4. I have tried modelling Ba2+ with coordinated waters, MPD, and sodium cacodylate into the electron density, but none of those fit well. Any suggestions regarding the identity of this electron density is much appreciated. Thank you! Sincerely, Betty Chu Paukstelis