Immunogen sequence: YSKNALALFV LPKEGQMESV EAAMSSKTLK KWNRLLQKGW VDLFVPKFSI SATYDLGATL LKMGIQHAYS ENADFSGLTE DNGLKLSNAA HKAVLHIGEK GTEAAAVPEV ELSDQPENTF LHPIIQIDRS FMLLILERST RSILFLGKVV. There are three proteins including thyroxine-binding globulin (TBG),