. 2011 Feb 1;149(5):551–562. doi: 10.1093/jb/mvr014

Table I.

Activity of rSynPTP towards exogenous substrates.

	Specific activity
Recombinant protein	RCML (³²P-Tyr) (pmol/min/mg)	Casein (³²P-Tyr) (pmol/min/mg)	pNPP (µmol/min/mg)
SynPTP	800 ± 20	1380 ± 70	3.1 ± 0.16
Cys₇Ser-SynPTP	ND	ND	ND

The catalytic activity of rSynPTP or mutagenically altered SynPTP was determined using 500 ng of each recombinant protein and 4 µM Casein (³²P-Tyr)/RCML (³²P-Tyr) or 10 mM pNPP as exogenous substrates as described in the ‘Materials and Methods’ section. ND, not detected, ≤2%.