Re: [ccp4bb] low insect cell expression

2009-03-23 Thread artem
Hi, Which secretion signal(s) did you use? The choice of secretion signal can make or break the entire process. Have you checked total yield of your protein in the cytoplasm and in the medium? Can you make assumptions regarding the bottleneck - is it protein synthesis/folding or is it the secreti

Re: [ccp4bb] low insect cell expression

2009-03-23 Thread artem
Hello Chen, You did not mention perhaps the most important element that can make or break the secretion process - namely the secretion signal. Which signal(s) have you already tried? Have you attempted to quantify the protein made in the total IC? In other terms, is the bottleneck in the protein

[ccp4bb] low insect cell expression

2009-03-23 Thread Daniel Jin
Hi,   We are trying to express a protein in insect cells as secreted. However, the yield is VERY low using either pFastBAC or pAcGP67A. We  have tried many different constructs and this is the only one that at least expresses. I wonder whether anyone knows how to improve. Many thanks.   Best, Ch