9-HYDROXY-TRAUMATIN, A NEW METABOLITE OF THE LIPOXYGENASE PATHWAY

9-Hydroxy-traumatin, 9-hydroxy-12-oxo-10E-dodecenoic acid, was isolate d as a product of 13S-hydroperoxy-9Z,11 E-octadecadienoic acid as cata lyzed by enzyme preparations of both soybean and alfalfa seedlings. Th is suggested that 9Z-traumatin, 12-oxo-9Z-dodecenoic acid, was being c onverted into 9-hydroxy-traumatin in an analogous manner to the previo usly identified enzymic conversion of 3Z-nonenal and SZ-hexenal into 4 -hydroxy-2E-nonenal and 4-hydroxy-2E-hexenal, respectively. Other meta bolites of 13S-hydroperoxy-9Z,11 E-octadecadienoic acid were similar f or both soybean and alfalfa seedling preparations, and they are briefl y described.