ID   2.7.99.1
DE   triphosphate--protein phosphotransferase.
AN   diphosphate--protein phosphotransferase.
AN   DiPPT.
AN   pyrophosphate-protein phosphotransferase.
CA   triphosphate + [microsomal-membrane protein] = diphosphate + [microsomal-
CA   membrane protein] phosphate.
CC   -!- This enzyme was originally thought to use diphosphate as substrate
CC       but this has since been disproved.
CC   -!- The activity is observed as the second part of a biphasic reaction
CC       after depletion of ATP.
CC   -!- Tripolyphosphate is a contaminant of [gamma-(32)P]ATP.
CC   -!- Formerly EC 2.7.1.104.
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