Fig. 6.

Assessment of differentially phosphorylated peptides. The (A,) total number and (B,) proportion of phospho-serine (pS), -threonine (pT), and -tyrosine residues (pY) was determined among those peptides experiencing differential phosphorylation (i.e., ± 1.2 fold change) in populations of noncapacitated versus, capacitated crocodile spermatozoa. pS/T, pS/Y, pS/T/Y = ambiguous phosphorylation of either: a serine or threonine residue, a serine or tyrosine residue, or a serine, threonine, or tyrosine residue, respectively.