Abstract
Sodium azide inhibited protein synthesis and replicative DNA synthesis at doses used for mutation induction (0.1–1 mM) in barley embryos. During subsequent treatment for 24 h using lower doses of azide, partial recovery from this inhibition was observed, especially in the case of replicative DNA synthesis. Contrary to expectation, cysteine acted as a weak enhancer of the inhibitory effect of azide on DNA replication. Under conditions of minimal replicative DNA synthesis, DNA-repair synthesis was detected after the azide action as measured by the BND-cellulose method. Benazzmide — an inhibitor of poly(ADP-ribose)-polymerase — stimulated the azide-dependent repair synthesis approximately 2-fold.
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