Molecular Species Compositions of Triacylglycerols in Subcutaneous Fat Biopsies Taken from Fattening Japanese Black

Abstract

The compositions of molecular species of triacylglycerol of subcutaneous fat biopsies taken from fattening spaiers and steers of Japanese Black were determined.There were no differences in the molecular species concentrations of triacylglycerols between spaiers and steers at 13 or 30 months of age, however the molecular species compositions of triacylglycerols of the 13 months of age were significantly different from those of the 30 months of age. The major molecular species of subcutaneous triacylglycerol at 13 months of age were [dipalmitoyland POO, and at 30 months of age were PPO and POO. POO had the highest concentration in these molecular species. POO, POL and SOL concentrations of subcutaneous triacylglycerols at 30 months of age were higher than those of 13 months of age.

Changes in molecular species composition of triacylglycerol in subcutaneous fat from beef cattle during fattening

“…POO was the molecular species with the highest concentration during the fattening period. These results were in agreement with our previous report (Itoh & Arihara 1998a). Although C18:1 c9 was the FA with the highest content in Table 2, trioleoyl‐glycerol (OOO) was not detected even as a minor species.…”

“…The molecular species of TG in bovine subcutaneous and intramuscular fat were tentatively identified as in a previous study (Itoh et al . 1997a,b; Itoh & Arihara 1998a) which used carcasses of Japanese Black, Japanese Shorthorn and Holstein cattle. In this study, we investigated the composition of TG species during fattening between the ages of 10 and 30 months (Table 3).…”

“…The molecular species of TG in bovine subcutaneous and intramuscular fat were tentatively identified as in a previous study (Itoh et al 1997a,b;Itoh & Arihara 1998a) which used carcasses of Japanese Black, Japanese Shorthorn and Holstein cattle. In this study, we The major molecular species were palmitoyl-dioleoylglycerol (POO), dipalmitoyl-oleoyl-glycerol (PPO), and dipalmitoyl-stearoyl-glycerol (PPS), which had C16:0, C18:0 and C18:1 c9 that were the major FA in Table 2.…”