2.3. Enzyme Production. The selected CDB isolates were
cultured at 37◦C at 150 rpm in an enzyme production media
composed of KH2PO4 0.5 g, MgSO4 0.25 g, and gelatin 2 g,
distilled water 1 L and containingWhatman filter paper No.1
(1 × 6 cm strip, 0.05 g per 20mL) and at pH 6.8–7.2