Abstract
The distribution of cis-monoenoic fatty acids with n-5 unsaturation within jujube (Zizyphus jujuba var. inermis) fruit was examined by GC and GC-MS. Analytical data indicated a series of n-5 monoenoic acid isomers with C14, C16, and C18 chain length to be present as the major acyl moieties in the pulp lipids (34.0%) and peel lipids (14.1%). No n-5 acid isomers could be detected in the seed lipids.
Following separation of the pulp lipids into nonpolar lipid, glycolipid and phospholipid fractions, the n-5 homologues were found widely distributed among these fractions without distinct localization. Thus in jujube pulp n-5 monoenoic acids appear to be important component fatty acids of membrane lipids, glycolipids and phospholipids.
