Gene order of the histidine utilization (hut) operons in Klebsiella aerogenes

P1-sensitive mutants of Klebsiella aerogenes were isolated and the gene order of the hut region was then determined using P1-mediated transduction. The genes are located in the Klebsiella chromosome between gal and bio as in Salmonella typhimurium. The gene order, gal, hutI, hutG, hutC, huU, hutH, bio is also the same as that observed in S. typhimurium.