A Mn2+-requiring enzyme present in the cytosol of mammalian and microbial cells. In contrast to the mammalian form, the bacterial form of the enzyme (type example of peptidase family S33) hydrolyses both polyproline and prolyl-2-naphthylamide. The mammalian enzyme, which is not specific for prolyl bonds, is possibly identical with EC 18.104.22.168, leucyl aminopeptidase.
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[EC 22.214.171.124 created 1965 as EC 126.96.36.199, transferred 1972 to EC 188.8.131.52]