values of k2 presented no significant dependence on temperature nor on the cultivar, as shown in Table 3. The average values of k2 were 1.6337 for the conventional cultivar 2B587 and 1.6272 for the transgenic cultivar 2B587 Hx. However, the values of k2 increased at higher temperatures such as 60 and 67 C. According to Abu-Ghannam and McKenna (1997),