Tertiary structure of proteins relies on covalent bonds between these amino acids, called disulfide bonds.
Palmitoylation most often occurs on this amino acid in proteins. Proteases that act on this residue include papain and a group of aspartate-directed enzymes that force the proteolytic cascade during apoptosis. PDI oxidizes this amino acid. Zinc fingers are especially rich in histidine and this other amino acid. In Anfinsen's experiment, beta-mercaptoethanol reduced this amino acid, causing proteins to unfold reversibly. This compound can be synthesized from (*) methionine and is nearly equivalent to serine, except its side chain is a thiol, not an alcohol. Tertiary structure of proteins relies on covalent bonds between these amino acids, called disulfide bonds. For 10 points, name this amino acid symbolized by a C.
Palmitoylation most often occurs on this amino acid in proteins.
cysteine [or Cys; or C before it is read]