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CTB is detected in purified SREHP-H and MBP-H complexes. SDS-PAGE-separated purified SREHP-H (lane 1), MBP-H (lane 2), and CTB (lane 3) underwent immunoblotting with polyclonal antiserum to CTB. All three preparations contain immunoreactive CTB (arrow). Molecular masses (in kilodaltons) are shown on the left.
