Value Per Nutrient Food 0.40 g 100 grams Tryptophan Duck, young duckling, domesticated, White Pekin, leg, meat only, bone in, cooked without skin, braised 0.40 g 100 grams Tryptophan Egg, yolk, dried 0.40 g 100 grams Tryptophan Lamb, Australian, imported, fresh, shoulder, arm, separable lean only, trimmed to 1/8" fat, cooked, braised 0.40 g 100 grams Tryptophan Beef, round, top round, separable lean and fat, trimmed to 0" fat, choice, cooked, braised 0.40 g 100 grams Tryptophan Beef, round, top round, separable lean and fat, trimmed to 0" fat, select, cooked, braised 0.40 g 100 grams Tryptophan Cereals ready-to-eat, wheat germ, toasted, plain 0.40 g 100 grams Tryptophan Lamb, New Zealand, imported, frozen, shoulder, whole (arm and blade), separable lean only, cooked, braised 0.40 g 100 grams Tryptophan Seeds, sesame butter, paste