Dear all, We crystallized a protein and found that crystal quality greatly depended on the location of His-tag. When a His-tag was added at the C-terminus, only crystalline precipitate or spherical quasi crystals were grown. However, when the His-tag was moved to the N-terminus, single crystals were grown under a number of conditions, and the best one diffracted to 1.7 angstrom after optimization. I was wondering if there were published reports describing similar cases.
Thank you in advance Wei Liu
