Definition: Protoproteose is a term in biology that refers to a protein that contains two or more copies of a single amino acid, which in this case is glycine. Protoproteoses are often found in bacteria and have been shown to play important roles in their functions, such as detoxification, synthesis of proteins, and regulation of cell signaling pathways. In summary, protoproteose refers to a protein that contains two or more copies of a single amino acid, which is glycine.