Immunogen sequence: MKFQYKEDHP FEYRKKEGEK IRKKYPDRVP VIVEKAPKAR VPDLDKRKYL VPSDLTVGQF YFLIRKRIHL RPEDALFFFV NNTIPPTSAT MGQLYEDNHE. GABARAPL1 increases cell-surface expression of kappa-type opioid receptor through facilitating anterograde intracellular tr