Fig. 2: N-terminal modification of a model peptide.
From: N-Terminal selective modification of peptides and proteins using 2-ethynylbenzaldehydes
a N-terminal modification of YTSSSKNVVR 1a with 2-ethynylbenzaldehyde 2a. b Deconvoluted mass spectrum of the reaction mixture. c MS/MS spectrum of N-terminally modified peptide 3a (inset: extracted ion chromatogram of mono-modified peptide). d Model reaction of isoquinolinium salt 3b from l-alanine β-benzylamide 1b and 2a.
