Fig. 4
From: Systematic quantitative analysis of H2A and H2B variants by targeted proteomics

Signature peptides are mostly devoid of post-translational modifications. a Numbers of H2A, H2B and H4 peptides used in the targeted proteomic analysis that were identified to be fully non-modified or modified to some extent by discovery LC–MS/MS analyses. b Abundance of modified versus non-modified forms of the signature peptides of H2B, TS H2B.1 and H4. Analyses were performed on spermatocytes (Sc), round spermatids (R), elongating and condensing spermatids (EC)