Hemimethylation At Biology Glossary

What is it? Double stranded DNA in which only one strand is methylated at a particular site. For example, at GATC sites in E. coli the A residues on both strands are methylated by DAM methylase but, because DAM methylase lags behind DNA polymerase, immediately after DNA replication only the parental strand is methylated.

Bio Definition Added By: Rebecca

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