Hi all,

Here's a problem I haven't come across before. I'm working on a structure whose 
expression plasmid was designed to remove the first 9 amino acids from the 
protein of interest and to which an N-terminal tag was added. After cleaving 
the tag I am left with 3 amino acids (GPM) followed by the original sequence. 
Obviously the residues of interest should follow the numbering of the original 
sequence (i.e. 10, 11, 12, ...). What numbers would you assign to the first 3 
residues (GPM)? 7, 8, 9? -2, -1, 0?

Cheers,

Tony

------------------------------------------------------

Dr. Antonio Ariza
University of Oxford
Sir William Dunn School of Pathology
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