👉 Metatranslational amino acid, or "metatransferrin," is a protein that is involved in the process of translocation of certain types of proteins within cells. It's responsible for transporting many different types of molecules across cell membranes, including proteins, lipids, and nucleic acids. Metatranslational amino acids are found on the surface of the cell membrane, which allows them to interact with other proteins and carry out their function.