Tapasin

Patent Pending TAP-associated glycoprotein also known as tapasin or TAPBP is a protein[1][2] that in humans is encoded by the TAPBP gene. This gene encodes a transmembrane glycoprotein that mediates interaction between newly-assembled major histocompatibility complex (MHC) class I molecules and the transporter associated with antigen processing (TAP), which is required for the transport of antigenic peptides across the endoplasmic reticulum membrane.