carboxymethyl cysteinyl 157.0309906005859375 157.19000244140625 C C 5 H 7 N 3 O 1 S 1 Carboxymethyl Cystenyl From DeltaMass:197 (Name misspelled "cystenyl", and formula incorrect, N and O reversed) Abbreviation:-Cmc- Formula:C5H7O1N3S1 Monoisotopic Mass Change:161.015 Average Mass Change:161.179 MOD:01061 MOD:01062 OBSOLETE because duplicate and redundant with MOD:01061. Remap to MOD:01061 PSI-MOD artifact true