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SDS-PAGE analysis and silver staining of purified LPS (50 ng) from K. pneumoniae strains grown overnight at 37°C in 25% NHS. Lanes correspond, from left to right, to LPS extracted from strains C3 (O1:K66), KD57 (O−:K2), KD341 (O−:K3), M9844/93 (O−:K47), USA0352/78 (O−:K47), and USA1555 (O−:K35).
