O-palmitoleyl-L-serine (2S)-2-amino-3-((9Z)-9-hexadecenoyloxy)propanoic acid 236.214019775390625 236.399993896484375 323.24603271484375 323.480010986328125 A protein modification that effectively converts an L-serine residue to O-palmitoleyl-L-serine. C 16 H 28 N 0 O 1 C 19 H 33 N 1 O 3 L-serine cis-9-hexadecenoate ester LIPID O-palmitoleyl serine MOD:01381 O-palmitoleyl-L-serine O3-palmitoleyl-serine PSI-MOD S mod186 natural uniprot.ptm:PTM-0493 O-palmitoleylated residue O3-acylated L-serine