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Adherence of genetically defined gonococcal mutants and variants for human corneal epithelial cells. Adherent gonococci are stained with crystal violet. (A) N400 (wild-type). (B) MW1 (pilC1∷erm). (C) MW2 (pilC2∷cat). (D) MW3 (pilC1∷erm, pilC2∷cat). (E) MW4 (pilTind). (F) MW7 (pilTind, pilC1∷erm, pilC2∷cat). (G) GT102 (pilTΔQSL). (H) MW9 (pilTΔQSL, pilC2?).
