To investigate whether WDR26 promotes breast cancer cell growth and metastasis in vivo, we inoculated equal numbers of MDA-MB-231 cells that expressed inducible GFP, WDR123-661, or WDR295-661 into the mammary fat pad of nude mice, and allowed them to form palpable tumors without inducing protein expression for 23 days. The gene discussed is WDR26; the disease is breast cancer.