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M. avium subsp. avium (M. avium) CF proteins and M. tuberculosis CF proteins (5 μg of total protein) were separated in SDS-PAGE and blotted onto nitrocellulose membranes. The molecular masses (in kilodaltons) are indicated. Lanes 1 were incubated with antiserum against M. tuberculosis CF proteins, and lanes 2 were incubated with antiserum against M. avium subsp. avium CF proteins.
