Receptor expression-enhancing protein AIESPSKDDD TVWLTYWVVY ALFGLAEFFS DLLLSWFPFY YVGKCAFLLF CMAPRPWNGA LMLYQRVVRP LFLRHHGAVD RIMNDLSGRA LDAAAGITRN VLQVLARSRA GITPVAVAGP STPLEADLKP SQTPQPKDK