Mass problem

Bryan Dunbar (b.dunbar@abdn.ac.uk)
Mon, 06 Jul 1998 15:43:52 +0100

Hi guys,
I have been sequencing a 31-residue polypeptide which contains 6
cysteines. The calculated mass from the sequence is 3491, assuming all
the Cysteines are involved in disulphides, which by homology, is pretty
definite. However, when we look at this thing in the Voyager, we always
get a mass of 3457 - anybody have any bright ideas about this "loss" of
34??
Best regards,
Bryan. 
-- 
Bryan Dunbar,
Protein Facility,
Room WT27,
Department of Molecular & Cell Biology,
University of Aberdeen,
Polwarth Building,
Foresterhill,
Aberdeen,
SCOTLAND.
AB25 2ZD.
TEL: 01224-273103
FAX: 01224-273104
e-mail; b.dunbar@abdn.ac.uk