2000 Copyright 2000. Actual coverage will always differ somewhat from what is printed here. Unless correctly folded, is not functional. A vast, but doable, challenge. Use study materials at The Biology Place to review the structure and function of proteins.
Some hormones consist of as little as a single amino acid.
Others are peptides or polypeptides. Each amino acid has an amino group and a carboxyl group , joined by a single Carbon atom. Only L-amino acids are found in proteins in all organisms. The most common amino acid, glycine, is only mildly nonpolar. Look at Fig.