Which type of reins a rider uses, split reins or one rein, is a matter of personal preference. Split reins are commonly seen in the Western riding disciplines, although some Western riders might use one rein. Split reins are heavily preferred by most working cowboys and cowgirls.
Antimicrotubule agent, mitotic inhibitor Oncology An agent that inhibits cancer growth by stopping cell division Pharmacology A drug that inhibits or blocks mitosis in a particular phase of the cell cycleâeg, metaphase arrest caused by colchicine and vinca alkaloids. See Chemotherapy.
âThis study suggests new approaches to enhance the efficacy of mitotic inhibitors in the treatment of human cancer.â The discovery goes a long way toward explaining one of the bigger ironies in medicine; doctors have long prescribed mitotic inhibitors like Taxol and Vincristrine without knowing precisely how the drugs destroy cancer.