Abstract
Rabbit globin mRNA was copied by AMV reverse transcriptase in the presence of various concentrations of deoxyribonucleotides (dNTPs). The cDNAs were analyzed by electrophoresis under denaturing conditions in formamide-polyacrylamide gels. Discrete size products were detected, ranging from 65 to 650 nucleotides—that is, up to the full length of the mRNA template. Increasing the concentrations of all four dNTPs stimulated formation of full-length transcripts and made the incomplete copies less abundant. Hybridization and nuclease digestion experiments indicated that the full-size product is indeed a complete transcript of globin mRNA. Similar results were obtained with chorion mRNAs. The possible usefulness of the discrete partial transcripts is discussed.
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