Hello, I've been trying to process a peptide with an N-terminal acetylation, however, simply "prepending" the .seq file with an ACE "residue" (as suggested in the initial response below) produces an error. Is there something more to this "prepending" process than just sticking ACE in the .seq file?
Here is the error output from the X11 prompt: Exception exceptions.AttributeError: "'NoneType' object has no attribute 'settrace'" in <bound method XplorWrapPtr.__del__ of <C XplorWrap instance at _40f04003_p_XplorWrap>> ignored Thanks! Tyler Hi Jan-- Apologies if this is already somewhere fairly obvious (I certainly can't seem to find it!) but is there any easy way, along the lines of the C-terminal amidation flag for seqToPSF, to add an acetyl group to an N-terminus? The current way of doing this is to prepend the sequence with the ``residue name'' ACE. hope this helps-- Charles
