Identification of amplification products by gel electrophoresis.

Lane 1: normal (αα/αα); 2: heterozygote −α^3.7(−α^3.7/αα); 3: homozygote −α^3.7(−α^3.7/−α^3.7); 4: heterozygote −α^4.2 (−α^4.2/αα); 5: homozygote −α^4.2 (−α^4.2/−α^4.2); 5: compound heterozygote −α^3.7/−α^4.2; and 7: molecular weight marker.