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. 2018 Oct 2;8(59):34004–34011. doi: 10.1039/c8ra06814c

LCMS analysis of peptides containing histidine and aspartic acid.

Peptide Mol. weighta/gmol−1 Mol. weightb/gmol−1 m/zc Charge (z) R T/min % Purity
P1 633.66 633.26 634.26 +1 4.969 81.4
P2 709.76 709.29 710.30 +1 5.754 84.0
P3 661.72 661.29 662.30 +1 5.259 72.9
P4 397.39 397.15 398.40 +1 7.242 99.0
P5 423.43 423.25 424.42 +1 7.690 98.9
a

Calculated molecular weight.

b

Experimental molecular weight.

c

Mass/charge ratio obtained from MS analysis.