The circular DNA is more stable and less sensitive to some DNases, preventing DNA shearing and loss.
Chitosanase is a powdered chitosanase preparation made by submerged fermentation of a selected strain of the bacterium Bacillus sp. The enzyme catalyzes the breakdown of chitosan, a partially or completely de-acetylated derivative of chitin (β-1,4 homopolymer of N-acetyl glucosamine).