Connexin 43 and HCN4 in mouse heart: FFPWS using Ab11370 and ab69054, respectively.

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Upper image ( anti HCN4) shows strong SA node positivity. Sure, a moderate b’ground positivity that could be lowered on further dilution.

Lower image ( anti Connexin 43 ) shows negative staining of SA node but strong positivity of intercalated discs of cardiomyocytes.