S-diacylglycerol-L-cysteine S-(sn-1-2,3-dipalmitoylglycerol)-L-cysteine 550.49609375 550.8900146484375 653.50531005859375 654.03997802734375 C From DeltaMass: Average Mass: 524 PSI-MOD C 35 H 66 O 4 none MOD:01144 S-(sn-1-Dipalmitoyl-glyceryl)- (on Cysteine) C 38 H 71 N 1 O 5 S 1 natural A protein modification that effectively converts an L-cysteine residue to S-(sn-1-2,3-dipalmitoyl-glycerol)cysteine.