Which of the following is a true statement regarding G6PD?

Question

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The G6PD gene has the greatest degree of variability in the human genome;this results in multiple clinical variants.The gene is found on the X chromosome,so it is only rarely clinically expressed in heterozygous female subjects who have one normal X chromosome.However,they can be shown to have varying numbers of G6PD-deficient red cells.The normal enzyme is called G6PD B.G6PD A contains one mutation so that its electrophoretic pattern is different,but it is a benign change.

Which of the Following Is a True Statement Regarding G6PD