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Table 1 Primary selection of polygalacturonase-producing isolates on Congo red medium

From: Preliminary investigations on a polygalacturonase from Aspergillus fumigatus in Chinese Pu’er tea fermentation

Potency index (D p/D c)

Number of isolates

D p/D c > 3.5

7

3.5 > D p/D c > 2.0

58

2.0 > D p/D c

78

D p/D c = 0

57