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Columns of (dT)(12-18)-cellulose provide a one-step enrichment procedure for RNA-dependent DNA polymerase. The enzyme of the virus from RD-114 cells, as well as that from Rauscher murine leukemia virus, have been purified in this way. The preference of viral as compared to cellular DNA polymerases for (dT)(12-18) as a primer is reflected in the fact that the DNA polymerases of uninfected cells do not bind to this column. Viral enzymes have been purified and identified from crude cellular extracts.

An Oligonucleotide Affinity Column for RNA-Dependent DNA Polymerase from RNA Tumor Viruses