Maximum lipase activity of Streptomyces sp. OC 119-7 was
observed at 120 h of fermentation (data not shown), which was
accepted as the optimal time for culture filtrate collection and
enzyme isolation. Previous studies found Streptomyces caelestis
DSM 40084, Streptomyces lavendulae DSM 40708 and Streptomyces
lipmanii DSM 40070 to exhibit maximum lipase activity at
approximately 120 h (Rapp and Backhaus, 1992), and Streptomyces
bambergiensis OC 25-4 to reach maximum lipase activity at 120 h