Figure 4

Peak area of peptides modified by V-type OPNAs with gradient concentration. C_(OPNAs) represents the final concentration in the solution system. Peptides Y*ICENQDSISSK, TY*ETTLEK, YLY*EIAR, KADDK*ETCFAEEGKK, C*VADESAENCDK and ETY*GEMADCCAK modified by VX in green. TC*VADESAENCDK and ECFLQHK*DDNPNLPR modified by Vs in yellow.