Isoform-specific differences between Rap1A and Rap1B GTPases in the formation of endothelial cell junctions

Abstract excerpt

Rap1 is a Ras-like GTPase that has been studied with respect to its role in cadherin-based cell adhesion. Rap1 exists as two separate isoforms, Rap1A and Rap1B, which are 95% identical and yet the phenotype of the isoform-specific knockout mice is different. We and others have previously identified a role for Rap1 in regulating endothelial adhesion, junctional integrity and barrier function; however, these early...

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