What is the another name for protein?

Polypeptide. Another name for protein is a polypeptide. Polypeptides are chains of amino acids that are held together by amine bonds. Proteins are made up of many polypeptides. Proteins perform various functions in the body. They function as transporting molecules, provide structural support to a cell, catalyze metabolic reactions (act as enzymes), cell signaling, immune response, and they play significant roles in the cell cycle.

Proteins are different from one another based on the sequence of amino acids they have. These amino acids are held together by peptide bonds. A peptide that contains two amino acid residues is termed dipeptide. A peptide with three amino acids is called tripeptide. Peptides with less than 20 to 30 residues are generally known as short polypeptides or oligopeptides.