"Disulfide bonds stabilize the structure of many proteins by forming intramolecular bridges. In this example, five disulfide bonds zip up the center of a protease inhibitor. Most extracellular proteins contain disulfide bonds. Disulfide bonds are formed by oxidation of two cysteine residues. In this reaction, the hydrogen atoms are removed from their sulfur atoms to allow formation of the sulfursulfur bond."
Essential Cell Biology, Second Edition
by Alberts, Bray, Hopkin, Johnson, Lewis, Raff, Roberts, Walter
copyright 2004 by Garland Science Publishing
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