Author/Authors :
Laratta، نويسنده , , B. and Loiudice، نويسنده , , R. and Giovane، نويسنده , , A. and Quagliuolo، نويسنده , , L. and Servillo، نويسنده , , L. and Castaldo، نويسنده , , D.، نويسنده ,
Abstract :
The thermal stability of three forms of pectin methylesterase purified from tomato was evaluated at pH 4.5. The time-dependent heat-inactivation curves for the three forms exhibit exponential behaviour in the temperature range between 70 °C and 90 °C. The determination of DT and Z parameters displays a different heat-inactivation kinetic among the three isoenzymes. In particular, two forms (PME1 and PME3) show similar behaviour with a Z value of 24 °C, whereas the third form (PME2) shows a Z value of 15 °C.
