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Western blots of whole-cell proteins of M. bovis strain 3683 probed with sera from 6 calves (A through F) collected on day 0 (lanes 1) and day 24 (lanes 2). Uninfected, calves inoculated with mycoplasma culture medium; infected, calves inoculated with M. bovis strain 3683; arrow, protein of interest seen in strip 2 in infected calves.
