TABLE 1.

Summary of high resolution analyses of PTMs seen on H3 peptides from Xenopus sperm, egg, erythrocyte, and S3 cultured cells Five H3 propionylated tryptic peptides (TKQTAR; KSTGGKAPR; KQLATKAAR; KSAPATGGVKKPHR; EIAQDFKTDLR) are shown in the left column. Each apparent modification on the lysines in those peptides is highlighted in the second column. The relative abundances of each modification in each histone source are displayed in the final four columns. Note that chromatographic separation of species containing Lys²⁷ methylation from species with Lys³⁶ methylation was not possible in erythrocyte or in S3 cells. Therefore, relative abundance information for mono- and dimethylation are reported as a single value.