We found that the common allele is preferentially expressed in normal lymphocytes , normal breast , and breast tumors compared with the rare allele , but there were no differences in total levels of GPX4 mRNA across genotypes .
O O O O O O O O O O O O O O O O O B-DiseaseOrPhenotypicFeature I-DiseaseOrPhenotypicFeature O O O O O O O O O O O O O O O B-GeneOrGeneProduct O O O O