The lethality of some D-arabinosyl nucleotides to mouse fibroblasts.

1This study was supported by American Cancer Society Grant E587. 'Present address: University of Pennsylvania, School of Veterinary Medicine, New Bolton Center, Kennen Square, Pa. 19348. 3To whom reprint requests should be addressed. Present address: University of Colorado Medical Center, Department of Microbiology, Denver, Colo. 80220. 4The abbreviations used are: FdUrd, 5-fluoro-2-deoxyuridine; ara-Cyt, 1-0-D-arabinofuranosylcytosine; ara-Ado, 9-(3-D-arabinofuranosyladenine; FdUrd-5'-P, 5-fluoro-2-deoxyuridine 5'monophosphate; ara-Cyt-5'-P, ara-Cyt-2'-P, and ara-Cyt-3'-P, the 5'-, 2'-, and 3'-monophosphates of ara-Cyt; ara-Ado-5'-P, 5'-D-arabinosyladenine monophosphate; FdUrd-3',5'-P, the 3',5'-cyclic monophosphate of FdUrd; ara-Cyt-2',5'-P, the 2',5'-cyclic monophosphate of ara-Cyt.