Re: [ccp4bb] ligand binds to one molecule

2022-03-05 Thread zaigham khan
Hey, That is a good question, and there could be multiple reasons. One possibility could be the crystal contacts. I have experience with the pentameric vial surface protein (PMID: 24648448), and I could see the carbohydrate ligand only in a subset of protein chains in ASU. Another reason could

Re: [ccp4bb] Problems with crystals diffracting

2021-07-27 Thread zaigham khan
Hey Rakesh, Such are the questions that every crystallographer faces in his/her everyday life. I am not sure if there is any straight forward answer. So make voyages ! Terese Bergfors mentioned in her famous book, "Protein crystallization" a case where a Scientist from Umea Uni got the

Re: [ccp4bb] Hello

2021-07-27 Thread zaigham khan
Hey Dr Afshan, You can also check the tab menu: Measure>Go to Atoms. There you can enter the residue number. The particular residue will be selected, and centred. Thereafter go to the Measure tab, and click residue info. A dialogue box will pop open, and there you may edit the values. I hope this

Re: [ccp4bb] 60 kDa contamination in Rosetta cells

2021-07-12 Thread zaigham khan
Hey Dilip, There are many reasons for this observation. Rafael is right, please do share the image of the gel. Also what are the exact sizes of the two proteins that you co-expressed? I have observed the heterodimeric and pentameric proteins on SDS-PAGE albeit the presence of DTT in the sample

Re: [ccp4bb] Cysteine oxidation product

2020-11-01 Thread zaigham khan
Hey Dhiraj, I saw this email yesterday, and I was waiting for others to respond. This seems like there is no simple answer to your question. This would be advantageous, if you kindly share the chromatograms of the WT proteins, and the mutant one, both in the presence and absence of the reducing

Re: [ccp4bb] how to get protein crystal

2019-12-27 Thread zaigham khan
ocused crystallization screen (such as JBS kinase screen for kinases). happy voyages! z Best wishes -Z Zaigham Khan, PhD Icahn School of Medicine at Mount Sinai Department of Oncological Sciences 1470 Madison Avenue New York On Fri, Dec 27, 2019 at 8:31 AM amala mathimaran wrote: > Dear all, &g