Structural studies on the hexose region of the core in lipopolysaccharides from Enterobacteriaceae

The structures for the hexose regions of cores from Enterobacteriaceae lipopolysaccharides have been investigated, using specific degradations and 1H NMR studies as the principal methods. Complete structures for these regions in the Salmonella, the Escherichia coli R1, R2, R3, R4, the E. coli K12 and E. coli B cores are proposed. Some complementary information on the structure of the heptose region has also been obtained.