THE VENOM OF THE MUD-DAUBER WASPS: I. SCELIPHRON CAEMENTARIUM: PRELIMINARY SEPARATIONS AND FREE AMINO ACID CONTENT

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Abstract
Quantitative investigation of Sceliphron caementarium venom, obtained by electrical excitation of the wasp, has shown an unexpectedly small protein fraction of the dried venom. A few percent of the venom consists of the free amino acids histidine, methionine, and pipecolic acid. Three other components have been isolated by paper and thin-layer chromatography and are found to give weak ninhydrin reactions, in addition to certain color tests characteristic of alkaloids.

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