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A DNA-dependent DNA polymerase characterized in E. coli and other lower organisms but may be present in higher organisms. Use also for a more complex form of DNA polymerase III designated as DNA polymerase III* or pol III* which is 15 times more active biologically than DNA polymerase I in the synthesis of DNA. This polymerase has both 3\'-5\' and 5\'-3\' exonuclease activities, is inhibited by sulfhydryl reagents, and has the same template-primer dependence as pol II.
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