SHQ1 and prostate neoplasm: Furthermore, the one prostate without full locus deletion had robust deletion of Foxp1 and Shq1. The ratio of Foxp1-Shq1 locus recombination to Foxp1-specific recombination averaged 0.38 by quantitative PCR of genomic DNA (12-month-old mouse prostate tumors), though this efficiency of locus recombination was variable between tumors as indicated by the standard deviation of 0.13.