title: Cephabacins, new cephem antibiotics of bacterial origin. I. Discovery and taxonomy of the producing organisms and fermentation.
abstract: Three Gram-negative bacteria produce new cephem antibiotics, named cephabacins, with unique 3-side chains. Cephabacins include F group antibiotics with a 7-formylamino substituent and H group antibiotics without the substituent. The producing bacteria were taxonomically characterized and designated as Lysobacter lactamgenus sp. nov. YK-90 and Xanthomonas lactamgena sp. nov. YK-278 and YK-280.
mesh_terms: D001419:Bacteria / Q000145:classification* / Q000378:metabolism; D002511:Cephalosporins / Q000302:isolation & purification*; D005285:Fermentation; D014974:Xanthomonas / Q000145:classification* / Q000378:metabolism
chemical_list: D002511:Cephalosporins; C044529:cephabacins