The three caprine KRTAP20-2 sequences would all encode polypeptides of 62 amino acid residues. These polypeptides contained a high content of glycine (32.26%), and moderate levels of tyrosine (20.97–22.58%) and cysteine (14.52%). The theoretical isoelectric points (pI) of the three putative polypeptides were all 7.26 and for these notional caprine KAP20-2 polypeptides, between five and six residues were predicted to be potentially phosphorylated (Figure 4).