Polymerase chain reaction amplification applied to the determination of beta-like globin gene cluster haplotypes.

We report here on the application of the polymerase chain reaction (PCR) technique for the determination of the beta-like gene cluster haplotypes. Seven fragments containing each one of the following polymorphic sites--Xmnl 5' to the G gamma gene, HindIII in the IVSII of G gamma and A gamma gene, HincII 3' and inside the gamma gene, Hinfl 5' of the beta gene, and HpaI 3' of the beta gene--are amplified using the PCR technique. Each amplified fragment is subsequently digested with the appropriate enzyme, analyzed by electrophoresis on agarose gel containing ethidium bromide, and visualized under ultraviolet light. This technique has the advantages of rapidity, safety, and cost-effectiveness.