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What is the exact molecular weight of this peptide? The sequence is:
Mass spec results are not confirming the expected molecular weight of this sequence. Is there any group on the N-terminus? Is there a C-terminal protection group on the cysteine, or just -COOH?
Asked on Nov 20 2012
I've attached the mass spec results for this peptide, which were obtained by the lab that produced the peptide.
The average MW of the peptide is 1505.7, and the ESI-TOF-MS is 1504.9. There is a C-terminal amide and the acetyled lysine, but no other modifications.
Answered on Nov 20 2012