displacement loop(redirected from D loop)
Also found in: Medical.
displacement loop[dis′plās·mənt ‚lüp]
(cell and molecular biology)
In circular deoxyribonucleic acid (DNA), a small region in which ribonucleic acid is paired with one strand of DNA, effectively displacing the other DNA strand. Also known as D-loop.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.