Polygalacturonase-mediated diss

of pectins in solutions mimi composition of tom a a, Pr tugu cien um; potential of PG present [5,10], but the reason for thisdiscrepancy is unknown. In in vitro reactions, the tomato PG isoform 2 (PG2) shows optimum activity at pH 4.5 and 250– 300 mM NaCl [6]. Under these assay conditions, PG2 mediates extensive dissolution and depolymerization of pectin fro