keratin proteins
hydrogen bonds
disulfide bonds
polypeptide chains
amino acids
peptide bonds
Chemical bonds that join amino acids together, end-to-end, in long chains.
Long, coiled polypeptide chains.
Long chains of amino acids joined together by peptide bonds.
Compounds made up of carbon, oxygen, hydrogen, nitrogen, and sulfur.
Strong chemical side bonds formed when the sulfur atoms in two adjacent protein chains are joined together.
Weak physical side bonds that are the result of an attraction between opposite electrical charges.
