Lipopolysaccharide phage receptor of Proteus mirabilis 1959 strain. Site of phage-mediated hydrolysis in O-specific polysaccharide.

The oligosaccharides isolated as products of phage "otto" provoked degradation of LPS provided by the host strain P. mirabilis 1959 were investigated. The site of phage mediated hydrolysis was shown to be the linkage 1,4(2) between galactosamine and glucuronic acid in the main chain of O-specific polysaccharide. The pentasaccharide (with one lysine residue) represents one phage cleaved repeating unit in the O-specific polysaccharide P. mirabilis 1959.