has functional parent N-palmitoyl-L-cysteine S-diacylglycerol-L-cysteine N-palmitoyl-S-diacylglycerol-L-cysteine A protein modification that effectively converts an L-cysteine residue to N-palmitoyl-S-diacylglycerol-L-cysteine. C MOD:00899 N-term PSI-MOD natural modified L-cysteine residue