Molecular origins of acetan solution properties.
Acetan is a branched acidic heteropolysaccharide secreted by Acetobacter xylinum. X-ray diffraction studies of oriented fibres suggest non-crystalline helices with fivefold symmetry and a pitch of 4.8 nm. Optical rotation and circular dichroism studies are consistent with the retention of the helical structure in solution and a helix-coil transition upon heating and cooling. Aqueous solutions yield high 'low shear rate' viscosity and shear-thin upon shearing.
Morris
V J
VJ
AFRC Institute of Food Research, Norwich Laboratory, UK.
Brownsey
G J
GJ
Cairns
P
P
Chilvers
G R
GR
Miles
M J
MJ
D000091:Acetobacter; D002240:Carbohydrate Sequence; D002942:Circular Dichroism; D008969:Molecular Sequence Data; D009904:Optical Rotation; D011135:Polysaccharides, Bacterial / Q000737:chemistry*; D012996:Solutions; D013696:Temperature; D014783:Viscosity; D014961:X-Ray Diffraction
D011135:Polysaccharides, Bacterial; D012996:Solutions; C068545:acetan