Re: [ccp4bb] dea all

2012-03-27 Thread Kevin Jin
I guess you already run SDS-PAGE to check the pellets before and after sonication. Not only the media. On Tue, Mar 27, 2012 at 7:35 AM, rana ibd wrote: > Dear all > I am expressing a 6xHis tagged in a dHBx protein in E.coli BL21 using LB > madia, I am having problems with the expression which sho

Re: [ccp4bb] dea all

2012-03-27 Thread Kelly Daughtry
When you lyse the cells and spin down cellular debris, is the pellet large and white (indicating inclusion bodies)? Is your protein soluble or membrane? What temperature did you use for expression? What vector are you using? Providing more details allows us to better answer your questions. Off the

[ccp4bb] dea all

2012-03-27 Thread rana ibd
Dear all I am expressing a 6xHis tagged in a dHBx protein in E.coli BL21 using LB madia, I am having problems with the expression which shows small amount of the protein , I also have problems with purification using NI-NTA by also having small amount even after extensive buffer exchange , Is i