Relier Pairs Hair CompositionVersion en ligne Match the term to the sentence that the term completes. par Rosalind Carter 1 salt bond 2 disulfide bond 3 lanthionine bond 4 hydrogen bond 5 side bond Strong, chemical side bond that joins the sulfur atoms of two neighboring cysteine amino acids. Bond created when disulfide bonds are broken by hydroxide chemical hair relaxers after the relaxer is rinsed from the hair. Weak, physical, cross-link side bond between adjacent polypeptide chains, easily broken by strong alkaline or acidic solutions. Bond that cross-links the polypeptide chains together and is responsible for the extreme strength and elasticity of human hair. Weak, physical, cross-link side bond that is easily broken by water or heat.