Below is an instruction from Human. Write a response.
    ### Instruction:
    What causes Glucose-6-phosphate dehydrogenase deficiency ?
    ### Response:
    What causes glucose-6-phosphate dehydrogenase (G6PD) deficiency?  Glucose-6-phosphate dehydrogenase (G6PD) deficiency is caused by mutations in the G6PD gene. This gene gives the body instructions to make an enzyme called G6PD, which is involved in processing carbohydrates.
    