Alignment analysis of rmpA sequences. Multiple sequences are compared with the reference sequence of GenBank accession number AB289642, which defined plasmid pK2044 rmpA gene from the strain K. pneumoniae NTUH-K2044 (http://www.ncbi.nlm.nih.gov/nuccore/AB289642). The strains KP 309, 401, 420, and 425 represent isolates which were PCR-positive for rmpA and rmpA2 but negative for hypermucoviscosity phenotype. The strain KP291 represents isolates without hypermucoviscosity phenotype, which were PCR-positive for rmpA but PCR-negative for rmpA2. The strain KP449 represents isolates with hypermucoviscosity phenotype, which were PCR-positive for rmpA and rmpA2.