Value Per Nutrient Food 1.21 g 100 grams Isoleucine Beef, short loin, porterhouse steak, separable lean and fat, trimmed to 0" fat, USDA choice, cooked, broiled 1.21 g 100 grams Isoleucine Beef, rib, eye, small end (ribs 10-12), separable lean and fat, trimmed to 0" fat, choice, cooked, broiled 1.21 g 100 grams Isoleucine Beef, round, tip round, roast, separable lean and fat, trimmed to 0" fat, select, cooked, roasted 1.21 g 100 grams Isoleucine Beef, short loin, porterhouse steak, separable lean only, trimmed to 0" fat, select, cooked, broiled 1.21 g 100 grams Isoleucine Beef, shoulder steak, boneless, separable lean and fat, trimmed to 0" fat, select, cooked, grilled 1.21 g 100 grams Isoleucine Duck, domesticated, meat only, cooked, roasted 1.21 g 100 grams Isoleucine Chicken, liver, all classes, cooked, pan-fried 1.21 g 100 grams Isoleucine Pork, fresh, loin, center rib (chops), boneless, separable lean and fat, cooked, braised