Immunogen sequence: VTVLKKALDE ETRSHEAQVQ EMRQKHAQAV EELTEQLEQF KRAKANLDKN KQTLEKENAD LAGELRVLGQ AKQEVEHKKK KLEAQVQELQ SKCSDGE. SM-MHC is a cytoplasmic structural protein, which is a major component of the contractile apparatus in smooth muscle cells. Ex