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DNA polymerases from avian, feline, murine and simian RNA tumor viruses exhibit substantial differences in optimal assay conditions and vary widely in their template-primer preferences. Avian DNA polymerase utilizes both natural and synthetic template-primers efficiently in the presence of Mg++ as well as Mn++. By contrast, the mammalian viral DNA polymerases are much more responsive to poly(A)·oligo(dT) than to other template-primers, and exhibit up to 20-fold greater activity with Mn++ than with Mg++. In addition, simian sarcoma virus DNA polymerase shows no detectable response to poly(C)·oligo(dG) over a wide variety of conditions stimulatory to the other viral enzymes. 相似文献
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Ago H Adachi T Yoshida A Yamamoto M Habuka N Yatsunami K Miyano M 《Structure (London, England : 1993)》1999,7(11):1417-1426
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