Abstract
Molecular combing (MC) yields preparations where individual DNA molecules are uniformly stretched and are parallel to each other. Fluorescence in situ hybridization on such preparations allows an exact mapping of DNA sequences, and pulsed inclusion of halogenated deoxyuridine analogs and their detection using fluorochrome-conjugated antibodies makes it possible to visualize replication. The MC technique was adapted for studying DNA replication in isolated Drosophila melanogaster organs, and it was checked whether a mutation of the Suppressor of UnderReplication (SuUR) gene directly affected the replication fork rate.
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