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Presence of a HarA (IsdH) protein spot and binding of antibodies to the HarA protein in 2-DGE and 2D-IB images. Most of the S. aureus isolates expressed the HarA protein during in vitro culture, as shown on the 2-DGE gel images. In the 2D-IB images, the HarA protein was not produced in vivo by any of the bacteremia or healthy-carrier isolates. An arrow indicates the presence of HarA, while an open circle indicates the absence of HarA.
