sentence: Proteins form an important part in foods like milk, eggs, meat, fish, beans, and nuts.
sentences_before: Muscles contain a lot of protein. When protein is digested, it is broken down into its amino acids. These amino acids can then be used to build new protein.
sentences_after: There are four things that determine what a protein will do. The first is the order of the amino acids. There are 20 amino acids, and they are all a bit different. The second is the little twists in the chain. The third is how the entire thing is folded up.
concept_name: protein
headings: Protein Proteins for humans
categories: Molecular biology