[ccp4bb] {Spam?} quick purification?

2009-08-10 Thread Mark Collins
, a longer his tag or a strep-tag. Any thoughts on the comparison between GST and strep and Ni purifications would be much appreciated. OR are there any other (better) high affinity purifications, I've missed, excluding expense Ab resins. Thanks, Mark Collins

[ccp4bb] Subject: off topic, purification from insect media and TFF/CFF

2009-05-26 Thread Mark Collins
Hey, I have a GST fusion protein secreted into express5 (with hint of serum), it does not bind beads. Changing pH with 4xPBS limits ppt and enables binding but in a scale up I think it makes sense to use a TFF/CFF setup for concentration and diafiltration. Does anybody have advice about

Re: [ccp4bb] OT: VectorNTI alternatives - 4 Mac?

2009-01-28 Thread Mark Collins
Hi Anybody have suggestions for Mac OsX alternatives? Thanks in advance, Mark

Re: [ccp4bb] Caution - 120 Hz LCDs: Not CRT killers yet...

2009-01-23 Thread Mark Collins
Hi Has anyone tried using video glasses such as MyVu as stereo glasses? www.myvu.com Seems like it could be a cheap (~$100/set) alternative to montitors + other hardware. Resolution maybe an issue. Just a thought, Mark

Re: [ccp4bb] Crystal growing in one direction...need suggestions

2008-10-14 Thread Mark Collins
Hi I also like to try the Hampton additive kit or the easier version; 90% current condition (at 1.1x) and 10% of any screen you can lay your hands on (ie hampton 1 2). Sitting verse hanging drops can change crystal size. Also in situ limited proteolysis, crazy but it works see for more info

Re: [ccp4bb] Expression vector with NdeI-ClaI sites

2008-07-21 Thread Mark Collins
-- Mark Collins Columbia University Biochemistry Molecular Biophysics Black Building 259/201 Office/Lab 212 305 1951 (work) [EMAIL PROTECTED]