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.
Partnering with Madonna has been extraordinary and we are thrilled to deepen the partnership supporting the release of MDNA and 'Give Me All Your Luvin'.
Messe Dusseldorf North America, Plastics & Rubber Vietnam 2012, Saigon Exhibition & Convention Center, Ho Chi Minh City, Vietnam, MDNA (312) 781-5180; www.
London, June 20 ( ANI ): Madonna transformed herself into 1920's German-American star Marlene Dietrich by sporting a black tuxedo and top hat at Paris Theatre in New York for the screening of 'Madonna: The MDNA Tour.
On the Madonna gig MDNA gig at NIA was fantastic - privileged opportunity to see the show in the only covered indoor arena date of the tour.
WE'VE teamed up with Smirnoff to give one and a friend the chance to perform live in Scotland on MDNA world tour hits Murrayfield a week and we have a up for grabs.
Madonna has been touring the globe on her MDNA tour, with concerts in Paris, New York, Barcelona, Tel Aviv and Buenos Aires.
Summary: Madonna performed her latest single Girls Gone Wild in Istanbul, on the latest leg of her MDNA world tour.
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.