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Also known as: DHP; DPD; DYPD; DHPDHASE
The protein encoded by this gene is a pyrimidine catabolic enzyme, which is the initiation factor and rate-limiting factor of uracil and thymine catabolic pathway. Mutations in this gene lead to dihydropyrimidine dehydrogenase deficiency, an error in pyrimidine metabolism associated with thymidine uraciluria, and an increased risk of toxicity in cancer patients receiving 5-fluorouracil chemotherapy. Two transcript variants of this gene have been found to encode different isoforms.