title: The hydrogenation of gamma-linolenic acid by pure cultures of two rumen bacteria.
abstract: Two species of rumen bacteria that have been previously shown to partially hydrogenate alpha-linolenic acid have been examined for their ability to hydrogenate gamma-linolenic acid. Free gamma-linolenic acid is hydrogenated in vitro to stearic acid by a rumen Fusocillus sp. (N.C.I.B. 11026), but only to cis,trans-octadec-6,11-enoic acid by a Butyrivibrio sp. The sequential hydrogenations are preceded by a delta 12-cis-delta 11-trans isomerization identical with that observed in the hydrogenation of alpha-linolenic acid and linoleic acid.
mesh_terms: D000818:Animals; D002417:Cattle; D005051:Eubacterium / Q000378:metabolism*; D005673:Fusobacterium / Q000378:metabolism*; D006865:Hydrogenation; D007536:Isomerism; D008042:Linolenic Acids / Q000378:metabolism*; D008968:Molecular Conformation; D009829:Oleic Acids / Q000378:metabolism; D012417:Rumen / Q000382:microbiology; D013229:Stearic Acids / Q000378:metabolism; D017965:gamma-Linolenic Acid
chemical_list: D008042:Linolenic Acids; D009829:Oleic Acids; D013229:Stearic Acids; C031183:stearic acid; C002446:12-octadecenoic acid; D017965:gamma-Linolenic Acid