CD34 and cancer: We further tested and compared the chemoprotective and proliferative effects of ORP100S and rhTRX in response to four different chemotherapeutic agents (5‐fluorouracil, 5‐FU; cisplatin; doxorubicin; and etoposide) on mouse EML and human cord blood CD34+ stem cells and human cancer cell lines MM1.R, MV4‐11, and HT29, and murine cancer cell lines EG7, B16‐F10, and TRAMP.