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. 2015 Mar;146-148:72–80. doi: 10.1016/j.mad.2015.05.001

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© 2015 The Authors

This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).

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Fig. 1 — Endogenous connexin expression in right atrial muscle. (A) Illustrative membranes from western blotting are shown for the connexin proteins: Cx45 (single band at 45 kDa), Cx43 doublet (band at 43 kDa is phosphorylated Cx43, the band at 41 kDa is non-phosphorylated Cx43) and Cx40 (single band at 40 kDa). Equal protein-loading was confirmed by desmin labelling (53 kDa). (B) Total endogenous Cx43 protein (μg) per total protein (μg) significantly declined with ageing (n = 5; ANOVA p < 0.001).