RELATION OF PHOSPHOLIPIDS TO OTHER TISSUE COMPONENTS IN 2 BEEF MUSCLES

The concentrations of total lipid and phospholipid were higher in the psoas major than in the extensor carpi radialis muscle of beef. The amount of phospholipid per unit weight of DNA, total N, protein N, and fibrillar protein N also was higher in the psoas than in the extensor. In terms of sarcoplasmic protein N, the concentration of phospholipid was similar in the 2 muscles. In both muscles, lecithin accounted for about 62 percent, cephalins 30 percent, and sphingomye-lin less than 10 percent of the lipid P recovered from thin layer chro-matographic plates.