The homology in nucleotide acid of hspA gene between H. pylori strains of MEL-HP27 and NCTC11637 was 97.48% and the homology in putative amino acids was 97.46%.

• 经测序，ureB基因全长1 7 1 obP，编码由569个氨基酸残基组成的肤链，MEL一HP27和NCTC 1 1 637 ureB基因序列同源性为97.；67%25，氨基酸序列同源性为99