Jae Kweon Park, Kumiko Shimono, Nobuhisa Ochiai, Kazutaka Shigeru, Masako Kurita, Yukari Ohta, Katsunori Tanaka, Hideyuki Matsuda, and Makoto Kawamukai. Purification, characterization, and gene analysis of a chitosanase (ChoA) from Matsuebacter chitosanotabidus 3001. J. Bacteriol. 181:6642-6649 (1999)