has functional parent S-12-hydroxyfarnesyl-L-cysteine L-cysteine methyl ester modified L-cysteine residue S-12-hydroxyfarnesyl-L-cysteine methyl ester 234.1983642578125 234.3800048828125 354.210296630859375 354.529998779296875 A protein modification that effectively converts an L-cysteine residue to S-12-hydroxyfarnesyl-L-cysteine methyl ester. C C 16 H 26 N 0 O 1 S 0 C 19 H 32 N 1 O 3 S 1 C-term MOD:01133 PSI-MOD S12HyFarnOMeCys natural