Reaction catalyzed by acid phosphatase (3.1.3.2), phosphoserine phosphatase (3.1.3.3), protein-tyrosine-phosphatase (3.1.3.48), phosphoenolpyruvate phosphatase (3.1.3.60)

		+		H2O	=			+
	O-phospho-L-threonine	+		H2O	=		L-threonine	+		phosphate