3.1.3.41	arsenate	competitive. 10 mM, 39% residual activity	255	
3.1.3.41	ATP	stimulates the 4-nitrophenyl phosphatase activity at concentrations of 0.001-0.030 mM, but inhibits it at concentrations above 0.5 mM, mechanism	4	
3.1.3.41	ATP	competitive	4	
3.1.3.41	Ba2+	-	111	
3.1.3.41	choline chloride	synergistic with ouabain	6500	
3.1.3.41	Ethacrynic acid	synergistic with ouabain	1046	
3.1.3.41	ethane diamine	inhibits Mn2+ stimulation of pNPPase (as well as K+ and Mg2+ stimulation)	138787	
3.1.3.41	Fluorescein isothiocyanate	i.e. FITC, inhibits both the ATPase and 4-nitrophenyl phosphatase activities of the enzyme, fluorescence labeling, inhibition depends on pH	15761	
3.1.3.41	additional information	not inhibitory: EDTA, calcium, copper, cobalt, levamisole, and 4-hydroxymercuribenzoate	2	
3.1.3.41	NaCl	synergistic with ouabain	42