JOURNAL OF BACTERIOLOGY, vol. 179, no. 24, page. 7742 - 7747, 1997-12
BIOCHEMISTRY, vol. 36, no. 46, page. 14030 - 14036, 1997-11-18
BIOORGANIC & MEDICINAL CHEMISTRY LETTERS, vol. 7, no. 21, page. 2709 - 2714, 1997-01