TABLE 1.

Specific activities of PME during growth on glucose, polygalacturonate (DE, 0%), and pectin (DE, 90%)^a

Carbon source	Sp act (mU/mg)
	Intracellular	Extracellular
Glucose	NDb	ND
Polygalacturonate	0.98 ± 0.10	19 ± 1.1
Pectin	1.12 ± 0.09	208 ± 5.7

^aCells were grown on MI medium containing a C source at a concentration of 1%. Intracellular and extracellular fractions were prepared as described in Materials and Methods. 

^bND, not detected.