Lipase from Brassica napus L. discriminates against cis-4 and cis-6 unsaturated fatty acids and secondary and tertiary alcohols.

Lipase (EC 3.1.1.

Specific positional distribution of acyl moieties in phospholipids is not generally deleted in neoplastic cells.

The distribution of acyl moieties at sn-1 and sn-2 positions of cholinphosphoglycerides (CPG) and ethanolaminephosphoglycerides (EPG) has been determined for neurosarcoma, sarcoma 180 and leukemia L 1210. In all the three samples, the positional distribution of acyl moieties in the two major classes of phospholipids is found to be similar to that in cellular phospholipids of most mammalian tissues. The saturated acyl moieties are located predominantly at sn-1 and polyunsaturated acyl moieties at sn-2, whereas the monounsaturated acyl moieties are randomly distributed between these two positions.

Formation of (n-9) and (n-7) cis-monounsaturated fatty acids in seeds of higher plants.

The relative abundance of (n-9) and (n-7) isomers in the monounsaturated fatty acids of seed lipids has been determined for selected plants in order to assess the biosynthetic reactions involved in their formation. Δ9 Desaturation of stearic acid to (n-9) octadecenoic acid is almost exclusively operative in the formation of monounsaturated fatty acids in the seeds of Helianthus annuus, Glycine max and Brassica napus, cv. Quinta and Erglu, in which chain elongation of monounsaturated fatty acids terminates at the level of an 18 carbon chain.

Molecular structure of glycerolipids in rats fed partially hydrogenated triacylglycerols.

The positional distribution of acyl moieties was studied in two major classes of glycerolipids, i.e. triacylglycerols and diacylglycerophosphocholines, of liver, heart and serum of rats that were fed either an unhydrogenated soybean oil (control group) or a partially hydrogenated soybean oil (experimental group) containing 12.