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Identification of the 10th residue of the peptide B22-B31 performed during Edman degradation. The illustration presents the HPLC chromatogram of the PTH amino acid residue detached during 10th cycle of sequencing, superimposed on the chromatograms of the acK as well as 3meK standards. The retention time of the 10th residue is identical as that of N-ε-acetyl-L-lysine.
