Table 1.

Localization of connexins in the heart.

Connexin	Localization	Reference
Cx37	Vascular endothelial cells, endothelial cells of the endocardium	[27]
Cx40	Vascular endothelial cells	[27]
	Fibroblasts	[28]
	Atria	[27,29]
	Smooth muscle cells	[30]
	His bundle	[31]
	Bundle branches	[32]
	Distal Purkinje system	[33]
Cx43	Atria	[27,29]
	Fibroblasts	[28]
	Smooth muscle cells	[30]
	His bundle	[31]
	Distal Purkinje system	[33]
	Ventricles	[29]