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acid phosphatase A Acid phosphatase A catalyzes the hydrolysis reaction via a phosphoseryl intermediate to produce inorganic phosphate and the corresponding alcohol, optimally at low pH. AcpA hydrolyzes a variety of substrates, including p-nitrophenylphosphate (pNPP), p-nitrophenylphosphorylcholine (pNPPC), peptides containing phosphotyrosine, inositol phosphates, AMP, ATP, fructose 1,6-bisphosphate, glucose and fructose 6-phosphates, NADP, and ribose 5-phosphate. AcpA is distinct from histidine ACPs and purple ACPs, as well as class A, B, and C bacterial nonspecific ACPs.
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