Histidine metabolism in fish. Urocanic acid in mackerel (Scomber scombrus)

Abstract
Urocanic acid, isolated from perchloric extracts of the flesh of mackerel (Scomber scombrus) using an anion exchange resin Dowex‐1 acetate, was identified by thin‐layer chromatography, u.v. absorption and mass spectra. During storage of sterile and non‐sterile tissue the concentration of urocanic acid increased at similar rates, indicating that L‐histidine ammonia‐lyase is not associated with bacterial spoilage.

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