title: Morphological variation of Enterobacter sp. BL-2 in acetate-mediated pH environment for excretive production of cationic microbial polyglucosamine biopolymer.
abstract: Enterobacter sp. BL-2 excretively produced unique cationic polyglucosamine biopolymer PGB-1 comprised of more than 95% D-glucosamine in an acetate-mediated culture condition. The excretion of the biopolymer PGB- was closely associated with the cellular morphology Enterobacter sp. BL-2, a feature highly dependable on the pH of the medium. The initially formed uneven and irregular surface cells were aggregated into the cell-biopolymer network structure connected by the adhesion modules of the cell-bound biopolymer. The excretive production of the biopolymer PGB-1 coincided with the disruption of the cell-biopolymer network, most actively at the medium pH of 8.0.
authors.affiliation: Department of Genetic Engineering, College of Natural Sciences, Kyungpook National University, Daegu 702-701, Korea.
authors.forename: Mi-Kyung
authors.initials: MK
authors.lastname: Son
authors.forename: Soo-Jung
authors.initials: SJ
authors.lastname: Hong
authors.forename: Kuk-Hwa
authors.initials: KH
authors.lastname: Sagong
authors.forename: Yong-Hyun
authors.initials: YH
authors.lastname: Lee
mesh_terms: D001431:Bacteriological Techniques; D001704:Biopolymers / Q000096:biosynthesis*; D003470:Culture Media; D004754:Enterobacter / Q000187:drug effects* / Q000254:growth & development / Q000648:ultrastructure*; D005944:Glucosamine / Q000096:biosynthesis*; D006863:Hydrogen-Ion Concentration; D007218:Industrial Microbiology / Q000379:methods; D019346:Sodium Acetate / Q000378:metabolism / Q000494:pharmacology*
chemical_list: D001704:Biopolymers; D003470:Culture Media; D019346:Sodium Acetate; D005944:Glucosamine