This was particularly apparent for a cluster of genes lying in a 90 Kb repeat unit on 17q12, including CCL3L1 (the most potent ligand for CCR5, with 96% homology to CCL3), CCL4, and TBC1D3, all of which showed significantly increased relative copy number in prostate tumors from self-identified BL patients (Supplemental Figure 7A). This evidence concerns the gene CCL3 and prostate neoplasm.