Gene cloning and characterization of alanine racemases from Shigella dysenteriae, Shigella boydii, Shigella flexneri, and Shigella sonnei.
Yokoigawa K, Hirasawa R, Ueno H, Okubo Y, Umesako S, Soda K. Biochem Biophys Res Commun. 2001 Nov 2; 288(3):676-84.