One of the human enzymes that are considered as interesting targets for drug development of cancer chemotherapy the kinesin spindle protein (KSP); a member of kinesin superfamily present in many tissues including testis, thymus, tonsils, and bone marrow.8 KSP also known as Eg5 plays a key role during the mitotic phase of cell division by forming bipolar spindles.9 An overexpression of this enzyme is observed in solid tumors and leukemia. The gene discussed is KIF11; the disease is cancer.