Hi Kumud,

I don't know,. Maybe because Warren wanted to label the end cap as residue number 1. Anyone else know?

Regardless if you want to renumber your sequence, just type the following or download the zero_residues script from the PyMOLWiki (http://www.pymolwiki.org/index.php/Zero_residues):

# adjust all residue identifiers by subtracting 'N'
# from their index. Replace 'N' with whatever 
# you want

alter mySeq, resi=str(int(resi)-N)

# update the sequence display



-- Jason

On Sat, Nov 19, 2011 at 10:19 AM, kumud agarwal <meet_kum04@yahoo.co.in> wrote:
I built a peptide using pymol. When I labelled the residues they are numbered fron 2 and not from 1 i.e. the first residues in my peptide is ALA and when I labelled this residue it is labelled as ALA-2 and not ALA-1.

I want to ask why it is not labelled starting from 1 instead of 2?

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