NCATS TDB has been collaborating with Dr Brent Stockwell’s group at Columbia Univ. to develop small molecules inhibitors of CoQ10 biosynthesis for the treatment of cancer. Currently, we have a series of inhibitors that show good potency and selectivity in vitro. We would like to test our lead inhibitor in a mouse model xenografted with SK-BR-3 human breast cancer cells. NCATS does not have in vivo efficacy testing facility nor capacity to run in vivo efficacy models, and therefore must get this service through a contractor.