Cross section of fatty acid chain of lipopolysaccharide (LPS)

Value 0.202 nm^2
Organism Bacteria Salmonella sp.
Reference Nikaido Hiroshi, Outer membrane, ch. 5 in Neidhardt F.C. Escherichia coli and Salmonella: Cellular and Molecular Biology. Vol 1, ASM Press 1996. note under table 1 Table - link
Primary Source Labischinski H, Barnickel G, Bradaczek H, Naumann D, Rietschel ET, Giesbrecht P. High state of order of isolated bacterial lipopolysaccharide and its possible contribution to the permeation barrier property of the outer membrane. J Bacteriol. 1985 Apr162(1):9-20.PubMed ID3980449
Method (primary source) X ray diffraction
Comments Note-primary source describes fatty acids as tightly packed in a hexagonal lattice, with a center-to center distance of 0.49 nm to the next-neighbor hydrocarbon chains in LPS and free lipid A (p.16 right column 1st paragraph). This gives a hexagon edge of 0.283nm and area of 0.208nm^2 rather than value given above.
Entered by Uri M
ID 103340