S-(ADP-ribosyl)-L-cysteine (R)-2-amino-3-([adenosine 5'-(trihydrogen diphosphate) 5'->5'-ester with alpha-D-ribofuranosyl]sulfanyl)propanoic acid 541.06109619140625 541.29998779296875 644.0703125 644.44000244140625 A protein modification that effectively converts an L-cysteine residue to S-(ADP-ribosyl)-L-cysteine. ADP Ribose addition ADP-Ribosyl ADPRibCys C C 15 H 21 N 5 O 13 P 2 S 0 C 18 H 26 N 6 O 14 P 2 S 1 From DeltaMass: Average Mass: 541. MOD:00178 MOD_RES ADP-ribosylcysteine PSI-MOD S-(ADP-ribosyl)- (on Cysteine) S-(ADP-ribosyl)-L-cysteine S-L-cysteine alpha-D-ribofuranoside 5'->5'-ester with adenosine 5'-(trihydrogen diphosphate) S-alpha-D-ribofuranosyl-L-cysteine 5'->5'-ester with adenosine 5'-(trihydrogen diphosphate) Unimod:213 natural uniprot.ptm:PTM-0055 monoadenosine diphosphoribosyl (ADP-ribosyl) modified residue modified L-cysteine residue