... 4-deoxy-D-arabino-hexose-containing O-specific polysaccharide from the lipopolysaccharide of Citrobacter braakii PCM 1531 (serogroup O6) Ewa Katzenellenbogen1, Nina A. Kocharova2, George V. Zatonsky2, Danuta Witkowska1, ... NaCl/Pi(PBS)containing 1% polyethylene glycol 6000.Results and discussionIsolation and chemical analysis of the O-specific polysaccharide On phenol–water extraction [9], the LPS of C. braakii PCM 1531 was ... haemaggluti-nation and inhibition of passive haemagglutination, SDS/PAGE and immunoblotting using O-antisera againstC. braakii PCM 1531 and PCM 1487.In double immunodiffusion (Fig. 4), the...