Thermostability of peroxidase from cabbage leaves

Resumen

Extracts of soluble and ion-bound peroxidase enzyme were obtained from the cabbage leaf (Brassica oleracea, L. var. capitata). Phosphate buffer solution 100 mM, pH 6.0 was used. A non-linear behavior was detected at 65, 70, 75ºC. The soluble peroxidase extract was much more stable than the ion-bound one. When regeneration analysis was undertaken at 70ºC, the ion-bound peroxidase continued stable and showed no renaturation, whereas the soluble extract became inactivated.