Abstract
The fatty acid compositions of Helicobacter mustelae whole cells, isolated phospholipids, and isolated lipopolysaccharides were analyzed by gas-liquid chromatography. Major phospholipid fatty acids were C16:0, C18:0, C18:1, and C19:0 cyc. In isolated lipopolysaccharides, 3-OH-C16:0, 3-OH-C14:0, C14:0, C16:0, and C18:0 were found. The lipid composition of H. mustelae thus showed pronounced differences from that of H. pylori. Flagella were purified by mechanical shearing and centrifugation steps. In all H. mustelae strains, the flagellin had an apparent molecular mass of 53 kDa and was thus the same size as H. pylori flagellin. The flagellin of strain NCTC 12032 was further purified and subjected to N-terminal amino acid sequence analysis. The first 10 amino acids were identical to those of H. pylori flagellin, but the next 5 were different. Significant homology was also found with flagellins of other bacteria.
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