GRAM domain-containing 2B protein (GRAMD2B; formerly GRAMD3), also known as NS3TP2 and HCV NS3-transactivated protein 2 is a protein encoded by the GRAMD2B gene.[5][6]
GRAMD2B has four paralogs: GRAMD1A, GRAMD1B, GRAMD1C and GRAMD2A. These proteins are mammalian representatives of the yeastlipid transfer proteins anchored at a membrane contact site (LAM) family.[7]