Four main types of chemical bonds are involved in protein gelation: (1) hydrogen bonds, (2) ionic linkages, (3) hydrophobic interactions,and (4) covalent bonds. The formation of intermolecular hydrophobic interactions among proteins, in addition to disulfide bonding that occurs during heating, is presently thought to be a primary mechanism of forming surimi gel (Gilleland, Lanier, & Hamann, 1997; Lanier et al., 2005).