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Point mutations in conserved amino acid residues within the C-terminal domain of HIV-1 reverse transcriptase
O Schatz1, F V Cromme, F Grüninger-Leitch
1Central Research Units, F. Hoffmann-LaRoche Ltd., Basel, Switzerland.
FEBS Letters
|November 6, 1989
Abstract:
Two single site substitutions (E478----Q and H539----F) were introduced into the C-terminal RNase H domain of HIV-1 reverse transcriptase. These mutant proteins were expressed in Escherichia coli and purified by Ni2+-nitrilotriacetic acid affinity chromatography. Both enzymes are clearly defective in RNase H function, but exhibit wild type reverse transcriptase activity.