sentence: Muscles contain a lot of protein.
sentences_after: When protein is digested, it is broken down into its amino acids. These amino acids can then be used to build new protein. Proteins form an important part in foods like milk, eggs, meat, fish, beans, and nuts. There are four things that determine what a protein will do. The first is the order of the amino acids.
concept_name: muscle
headings: Protein Proteins for humans
categories: Molecular biology