High zinc salt content possibly inactivated endogenous proteases at some degree,resulting in low degradation of MHC as evidenced by the higher MHC band intensity retained. Zn2+ has been reported as a potent inhibitor of several proteases, e.g.calpains. ZnCl2 in fusion blocked postmortem proteolysis and tenderization of ovine carcasses because Zn2+ inhibited both calpains and cathepsins B and L activities(Koohmaraie,1990).