Pepsin-like Enzyme in Larvae of Stable Flies

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Science  29 May 1959:
Vol. 129, Issue 3361, pp. 1484-1485
DOI: 10.1126/science.129.3361.1484


A pepsin-like enzyme has been found in larvae of the stable fly. The activity is detectable in homogenates of whole larvae and in homogenates of isolated midguts, the latter of which possess a pH environment low enough to support a peptic enzyme. The pH optimum of the activity was determined to be 2.4.