Applied Biosystems iTRAQ(TM) multiplexed quantitation chemistry MOD:00564 MOD:01505 Modification from Unimod Isotopic label. The Unimod term was extracted when it had not been approved. OBSOLETE because redundant to MOD:01505. Remap to MOD:01505, or one of the child terms MOD:01493 or MOD:01497. PSI-MOD Representative mass and accurate mass for 116 & 117 Unimod:214 X artifact iTRAQ4plex true