Hydrolysis experiments were conducted in a 250 mL
polyethylene reactor with constant agitation (200 rpm).
The reactor vessel was placed in a thermostaticallycontrolled
water-bath, and the temperature was kept at
55.3 °C. The pH-stat technique was used (13), the pH
being maintained at 8.3 by the addition of 0.2 mol/L
NaOH. The reaction mixture consisted of 45 g of
*To whom correspondence should be addressed. ground dogfish muscle and 0.1 mol/L phosphate buffer