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Connexin 40 (40 kDa) and GAPDH (∼37 kDa) expression levels in 10 µg of female (F6–F10) and male PCAs (M6–M9) with 20 µg of pig kidney (PK) lysate as positive control (A). Ratio of the expression levels of connexin 40 to GAPDH in male and female PCAs based on the intensities of their bands (B). Data are expressed in the ratio of Cx40 to GAPDH intensities bands and are mean ± SEM of four to five experiments.
