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Glutathione peroxidase is a selenium-containing, antioxidant enzyme previously implicated in the risk and development of lung and breast cancer, in part the result of allelic loss at the GPx-1 locus. This study examined allelic loss at the same locus in squamous cell carcinomas of the head and neck. The frequency of a polymorphism at codon 198 resulting in either a leucine or a proline at that position...
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