An enzyme having esterase activity accumulates in the culture media of mouse peritoneal mononuclear leukocytes during differentiation of the cells into macrophages. It has a pH optimum of 6.5 and shows aryl esterase characteristics. The esterase differs from another macrophage hydrolase, acid phosphatase, in its mainly extracellular distribution.

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http://dx.doi.org/10.1126/science.159.3811.217DOI Listing

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