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Agarose gel showing the identification of the Hb Q-India mutation by amplification refractory mutation system polymerase chain reaction. Samples tested were: lane 3, DNA from a normal control; lane 4, DNA from a patient with Hb Q-India (case 1); lanes 1 and 5, φX174 DNA marker fragments; lane 2, water blank control. The amplified product of 766 bp is the control fragment and the product of 370 bp is the Hb Q-India specific product.
