The epsins define a family of proteins that interact with components of the clathrin coat and contain a new protein module.
Rosenthal, J A, H Chen, V I Slepnev, L Pellegrini, A E Salcini, P P Di Fiore, and P De Camilli. 1999. “The Epsins Define a Family of Proteins That Interact With Components of the Clathrin Coat and Contain a New Protein Module.”. The Journal of Biological Chemistry 274 (48): 33959-65.