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. Author manuscript; available in PMC: 2021 Feb 5.
Published in final edited form as: J Am Soc Mass Spectrom. 2020 Jan 13;31(2):394–404. doi: 10.1021/jasms.9b00024

Table 6.

Frequency Distribution of Signature Fragment Ions from Bxxp-Modified Tyrosine Peptides Identified from Apex2 BioSITe Experiment

m/z no. of PSMs no.of peptides
227.085 883 (99%) 464 (99%)
310.159 56 (6%) 45 (10%)
340.168 826 (93%) 436 (93%)
453.251 113 (13%) 77 (16%)
706.361 782 (88%) 411 (88%)
723.388 473 (53%) 260 (56%)