mitochondrial DNA

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mitochondrial DNA (mtDNA),

species of DNA present in mitochondria, where it participates in energy metabolism, rather than in the nucleus.

mitochondrial DNA

n. Abbr. mtDNA
DNA that is contained in the mitochondria of eukaryotic cells and is inherited maternally.

mitochondrial DNA

A small circular DNA molecule of which all MITOCHONDRIA in cells have several copies. It contains 16,569 base pairs and 37 genes. Being present in the cytoplasm of the cell, is transmitted exclusively by the mother. A mature ovum contains about 100,000 copies of mitochondrial DNA; sperms contain none. The genome has been completely sequenced. Its main function is to code for enzymes needed by the mitochondrion. The sites of common mutations, especially deletions, are known as are a number of diseases caused by these defects in the mitochondrial DNA. See MITOCHONDRIAL DNA DISEASES.

mitochondrial DNA (mtDNA)

the DNA GENOME in the MITOCHONDRION that codes for a number of the organelle's functions. The genome is replicated and transcribed by a separate set of ENZYMES from those of the eukaryotic cell NUCLEUS. In METAZOANS the mtDNA is generally circular, and there appear to be no INTRONS. The GENETIC CODE shows differences from the universal code.
References in periodicals archive ?
For instance, replacing mDNA might have more of an impact on personal traits than had been envisaged.
In the MDNA tour, Madonna had 88 performances in 67 cities.
The two hour nonstop performance includes songs from Madonna's MDNA album such as "Girl Gone Wild" and "Gang Bang," as well as fan favorites including exhilarating versions of "Hung Up," "Express Yourself," "Vogue," "Open Your Heart," "Like A Prayer" and "Celebration.
Madge's MDN hi h ts Edinburgh's M week on Saturday a pair of tickets u To celebrate th T Ma M donna's new Smirnoff have c li li l mited edition p contains exclusi ba b ckstage con ba b opportun pr p izes downl ti t cket Th al a so hi h g the launch of Madonna's album MDNA, Smirnoff created a limited pack that contains exclusive access to backstage content and an opportunity to win prizes such as music downloads, merchandise and tickets.
The tour showcases The Queen of Pop's new album, MDNA, which includes the single Give Me All Your Luvin'.
When the first set of pictures started trickling in from our wire services from Madonna's first MDNA Tour performance on Thursday, we in the office began wondering if she would edit elements of her routine.
Trade Fair Plastics and Rubber, Expocentre, Moscow, Russia, MDNA (312)
Companies are provided with a fully equipped turnkey booth that MDNA will custom-design according to the exhibitor's specifications.
By analysing this mDNA, scientists at Oxford University are able to determine which of seven women, living tens of thousands of years ago on the landmass we now call Europe, each of us is related to.
Apparently MDNA had been working in parallel with AMTDA, and the used-machine dealers signed the pact with eSprocket.
A 12-year-old Rocco, who performed during her MDNA tour last year, is also growing up.
LOS ANGELES, June 6, 2013 /PRNewswire/ -- Madonna's groundbreaking, critically acclaimed, controversial and visually stunning MDNA concert will be available in the US on August 27[sup.