Gap19 TFA, a peptide derived from nine amino acids of the Cx43 cytoplasmic loop (CL), is a highly potent and specific connexin 43 (Cx43) hemichannel blocker. Gap19 TFA inhibits hemichannels caused by preventing intramolecular interactions of the C-terminus (CT) with the CL. Gap19 TFA is not blocking GJ channels or Cx40/pannexin-1 hemichannels. Gap19 TFA has protective effects against myocardial. References: [1]. Boengler K, et al. Connexin 43 impacts on mitochondrial potassium uptake. Front Pharmacol. 2013 Jun 6;4:73. [2]. Wang N, et al. Selective inhibition of Cx43 hemichannels by Gap19 and its impact on myocardial ischemia/reperfusion injury. Basic Res Cardiol. 2013 Jan;108(1):309.

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