N -Acetylhistidine Isolated from Frog Heart

Abstract
A diazo-positive compound was found in an extract of frog heart. This substance showed a negative ninhydrin reaction and had on a paper chromatogram developed with a phenol-hydrochloric acid solvent system a higher R F than carnosine. The substance, isolated by chromatography, was identified as N -acetyl- L -histidine.

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