A displaced DNA single strand that is created after strand invasion.

An intermediate structure formed during the Meselson-Radding model for homologous recombination. Also an intermediate formed during displacement replication.

This is a loop made out of rope or metal that attaches to the bowstring usually tied in at top and bottom of where nock is positioned on string. Used as a aid to clip your release to. Using the d-loop will increase your draw length about a 1/2".