What specific molecule is soy beans mostly made of?

Soybeans are primarily composed of proteins, which make up about 35-40% of their dry weight. The main protein found in soybeans is called glycinin, along with other proteins like β-conglycinin. Additionally, soybeans contain significant amounts of oil (approximately 20%), carbohydrates, and various vitamins and minerals. Overall, their nutritional profile makes them a valuable food source.