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- W1514853126 abstract "Four C(2')-substituted 2'-deoxyadenosines were examined as substrates for human erythrocytic adenosine deaminase and for formation of intracellular nucleotide analogs in human erythrocytes, lymphocytes and murine Sarcoma 180 cells: 9-(2'-deoxy-2'-fluoro-beta-D-ribofuranosyl)adenine, 9-(2'-deoxy-2'-fluoro-beta-D-arabinofuranosyl)adenine, 9-(2'-azido-2'-deoxy-beta-D-ribofuranosyl)adenine (2'-N3-riboA) and 9-(2-azido-2'-deoxy-beta-D-arabinofuranosyl)adenine. All four adenosine analogs were substrates of human erythrocytic adenosine deaminase, but the corresponding inosine analogs (synthesized by the adenosine deaminase reaction) were highly resistant to cleavage by human erythrocytic purine nucleoside phosphorylase. Only 9-(2'-deoxy-2'-fluoro-beta-D-ribofuranosyl)hypoxanthine underwent very slow phosphorolysis, and no inhibition of inosine phosphorolysis was detected when a 30 microM concentration of any studied inosine analog was added to a reaction mixture containing 30 microM inosine (the Km concentration). Kinetic parameters were determined for the deamination of the adenosine analogs. The greatest affinity for adenosine deaminase was found with 2'-N3-ribo A (Ki = 2 microM), but the reaction velocity was highest with the F-substituted analogs. All four adenosine analogs formed triphosphate nucleotides after incubation with human erythrocytes, murine Sarcoma 180 cells, or human lymphocytes (tested only with the F analogs) in the presence of deoxycoformycin." @default.
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- W1514853126 date "1982-05-01" @default.
- W1514853126 modified "2023-10-18" @default.
- W1514853126 title "C(2′)-substituted purine nucleoside analogs" @default.
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- W1514853126 doi "https://doi.org/10.1016/0006-2952(82)90675-x" @default.
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