To address this hypothesis, we genotyped tagging SNPs (tagSNPs) of five TTSP genes, TMPRSS1, TMPRSS2, TMPRSS3, TMPRSS7, and TMPRSS11E, two other serine proteases uPA and PRSS8, and HGF, and investigated their association with breast cancer risk and patient survival. The gene discussed is PLAU; the disease is breast cancer.