Ibuki F, Kotaru M, Kan K K, Ikeuchi T, Kanamori M
J Nutr Sci Vitaminol (Tokyo). 1983 Oct;29(5):621-9. doi: 10.3177/jnsv.29.621.
The chemical composition of dry seeds of four varieties, pods, stalks and leaves of winged beans (Psophocarpus tetragonolobus) was determined. The seeds had a high range of protein (27.8-36.6%) and fat (14.8-17.9%), which were similar to soybeans. the seeds contained high phosphorus, calcium and magnesium. The leaf was highest in protein content (33.7%) of all the parts studied except for the seeds. The protein and fat content of pods decreased as pods ripened. the calcium content in the leaf was much higher than in the other parts. Protein was extracted sequentially with 2% NaCl, 30% isopropyl alcohol, 4% lactic acid and 0.5% KOH from dry seeds of four varieties of winged beans. The NaCl extract showed the highest range of protein concentration (60.2-77.6%). The NaCl extract was separated into two fractions based on solubility in water. the amino acid composition of the flour from the seeds and of the two fractions from the NaCl extract were determined. Contents of lysine, aspartic acid, glutamic acid and leucine were large, while the sulfur-amino acid content was small. Trypsin and chymotrypsin inhibitory activities of 2% NaCl extract from the seeds were determined, and chymotrypsin inhibitory activity was higher than the trypsin.
测定了四棱豆（Psophocarpus tetragonolobus）四个品种的干种子、豆荚、茎和叶的化学成分。种子含有较高含量的蛋白质（27.8 - 36.6%）和脂肪（14.8 - 17.9%），与大豆相似。种子富含磷、钙和镁。在所研究的所有部位中，除种子外，叶的蛋白质含量最高（33.7%）。随着豆荚成熟，其蛋白质和脂肪含量降低。叶中的钙含量远高于其他部位。从四棱豆四个品种的干种子中依次用2%氯化钠、30%异丙醇、4%乳酸和0.5%氢氧化钾提取蛋白质。氯化钠提取物的蛋白质浓度范围最高（60.2 - 77.6%）。根据在水中的溶解度，将氯化钠提取物分为两个组分。测定了种子面粉以及氯化钠提取物两个组分的氨基酸组成。赖氨酸、天冬氨酸、谷氨酸和亮氨酸含量较高，而含硫氨基酸含量较低。测定了种子2%氯化钠提取物的胰蛋白酶和糜蛋白酶抑制活性，糜蛋白酶抑制活性高于胰蛋白酶。
