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Fig. 2. Protein immunoblot analyses for Cx43, Cx45 and Cx46 in HeLa transfectants. Samples from HeLa and HeLa transfectants were resolved by SDS-PAGE, electrophoretically transferred to PVDF membranes, and then probed with antisera against Cx43, Cx45 or Cx46. Migration of molecular mass standards is indicated in the figures.