Chitin deacetylase (CDA) catalyzes the conversion of chitin to chitosan by the deacetylation of N-acetyl-D-glucosamine residues. In this study, 9 strains of bacteria with chitin deacetylase activity were isolated from canal mud samples from the Xiangjiang River in Changsha, Hunan Province. Of these 9 strains, the Z7 strain had the highest chitin deacetylase activity, as determined by enzyme assay screening. Based on its culture, morphological, physiological characteristics and molecular identification, strain Z7 was identified as Bacillus amyloliquefaciens. Yeast extract at a concentration of ...
