Abstract

The distribution of Na +-K +-activated, Mg 2+ dependent ATPase (E.C. 3.6.1.3) was investigated in the alimentary tract of Locusta migratoria using biochemical and histochemical methods. Relatively high levels of Na +-K +-activated ATPase were present in microsomal preparations from the rectum, whereas preparations from the fore, midguts, ileum, and colon had low activity. The localisation of Na +-K +-activated ATPase in the epithelium of the rectal pads was examined but proved inconclusive.

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