Polymeric and compositional properties of novel extracellular microbial polyglucosamine biopolymer from new strain of citrobacter sp. BL-4.
A novel polyglucosamine polymer, PGB-2, was produced extracellularly from a new strain Citrobacter sp. BL-4 using pH-stat fed batch cultivation. It was composed of 97.3% glucosamine and 2.7% rhamnose; its average molecular weight, solubility in 2% acetic acid and viscosity were 20 kDa, 5 g l(-1) and 2.9 cps, respectively. FT-IR and 1H NMR spectra of PGB-2 revealed a close identity with chitosan from crab shells.
Department of Genetic Engineering, College of Natural Sciences, Kyungpook National University, Daegu 702-701, S. Korea.
Lin-Su
LS
Kim
Soo-Jung
SJ
Hong
Mi-Kyung
MK
Son
Yong-Hyun
YH
Lee
D000595:Amino Acid Sequence; D048271:Chitosan / Q000737:chemistry*; D002954:Citrobacter / Q000145:classification* / Q000378:metabolism*; D045604:Extracellular Fluid / Q000737:chemistry / Q000378:metabolism; D005944:Glucosamine / Q000032:analysis* / Q000737:chemistry* / Q000378:metabolism; D008969:Molecular Sequence Data; D008970:Molecular Weight; D011108:Polymers / Q000737:chemistry; D012995:Solubility; D013045:Species Specificity; D014783:Viscosity
D011108:Polymers; D048271:Chitosan; D005944:Glucosamine