Abstract
We have synthesised and examined the enzymatic incorporation properties of the 5′-triphosphates of 2′-deoxyribosyl pyrrole 3-monocarboxamide (dMTP) and 2′-deoxyribosyl pyrrole 3,4-dicarboxamide (dDTP). These analogues we had hoped would behave as ambivalent base analogues in that they can present two alternative hydrogen-bonding faces either by rotation about the carboxamide group or about the glycosidic bond. The two pyrrole derivatives, dMTP and dDTP, exhibit a preference for incorporation with Klenow polymerase. They are preferentially incorporated as either A or C.
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