Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
PSD MALDI mass spectrum of a derivatized tryptic peptide from a variant protein. The y1 ion is observed at m/z 175 establishing the C-terminal residue as R (not labeled by the software). Mass differences between adjacent y-ions establish the identities of the remaining amino acid residues (indicated on the figure).
