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LDHk, the lactate dehydrogenase associated with transformation by the Kirsten sarcoma virus: a re-evaluation.
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A lactate dehydrogenase isozyme designated "LDHk" has recently been described in cells transformed by the Kirsten murine sarcoma virus. Several unusual properties were felt to distinguish this LDH isozyme from previously described LDH isozymes. These properties include cathodic electrophoretic
The inhibition by a series of potentially bioreductive naphthoquinones of rat liver mitochondria and sarcoma 180 tumor cell respiration.
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A series of potentially bioreductive naphthoquinones were investigated for their effects on rat liver mitochondrial electron transport and energy transfer and their ability to inhibit Sarcoma 180 tumor cell respiration in vitro. It was found that all the naphthoquinones evaluated, inhibited tumor
Preferential activation of mitomycin C to cytotoxic metabolites by hypoxic tumor cells.
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Mitomycin C, a bioreductive alkylating agent with clinical utility against several human tumors, was found to be selectively toxic at a relatively low concentration (1.5 micro M) to EMT6 tumor cells made chronically hypoxic by preincubation in 95% N2-5% CO2 for 4 hr prior to drug exposure. This
From protein synthesis to genetic insertion.
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In 1946, (14)C-cyanide made its appearance as an offshoot of the Atomic Energy Program. Our colleague Robert Loftfield built it into (14)C-alanine by the Strecker synthesis, and a lusty program directed toward uncovering the unknown mechanism of protein synthesis grew out of this beginning. The
Synthesis and antiviral activity of 3'-C-cyano-3'-deoxynucleosides.
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A series of 3'-C-cyano-3'-deoxynucleosides have been synthesized and evaluated as antiviral agents. Reaction of 2',5'-bis-O-(tert-butyldimethylsilyl)-beta-D-erythro-pentofuranos- 3'-ulosyl derivatives of uracil, 4-N-acetylcytosine, and adenine with sodium cyanide gave a mixture of epimeric
An abnormal ratio of cytochromes in the respiratory chain of mouse and human myelomas.
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Mouse myeloma cells and mitochondria had the same kinds of cytochrome components in the respiratory chain as the normal ones. Their constitution, however, was abnormally different from that found in normal cells and mitochondria. The cytochrome aa3 concentration was especially low in the myeloma as
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