Fig 5. Time-courses of the denaturation of myosin in muscles with faster slower rates of pH fall. Rates of pH are 0.001, 0.002, 0.004 and 0.007 units/min as indicated. Initial and final pH 7 and 5.5 respectively. Initial and final temperature, 39 ^oC and 4^oC, respectively. a) Half-cooling time 180 min; b) Half-cooling time 700 nm.