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Schematic representation of the S. aureus clumping factor gene (clfA) including relevant subdomains. The relevant subdomains are indicated as follows: 1, Signal sequence; 2, fibrinogen binding A region; 3, SD repeat; 4, wall anchor (LPXTG) and membrane-spanning domain. The positions and orientations of the Tn551 insertions are indicated. Abbreviations: H, HindIII; P, PstI; X, XhoI.
