Terregens factor functions as a growth factor for Arthrobacter terregens. The compound, a hydroxylamine-containing iron chelator (Burton, Sowden, and Lochhead, Can. J. Biochem. Physiol. 32:400, 1954), belongs to the class of microbially synthesized growth factors called sideramines (Bickel et al., Experientia 16:129, 1960). Other naturally occurring growth factors such as ferrichrome, coprogen,...
