| Upon co expression in cultured cells , CALP was directly bound to and co localized with PS 2 in endoplasmic reticulum . 1.0383291^^^ Molecular cloning and characterization of CALP / KChIP4 , a novel EF hand protein interacting with presenilin 2 and voltage gated potassium channel subunit Kv 4 . 0.68087912^^^ |