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 ?
In these figures, traces labeled (1) represents the fluorescence spectra of the dye in gcDNA, mDNA, and at DNA at a dye to DNA-phosphate ratio of 1:50 (8nM dye and 400 nM DNA-phosphate) in buffer only (absence of protein).
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As a result, the donor egg is left with nuclear DNA from the mother and mDNA from the donor.
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Area of Specialization: Food, Beverage, Pharmaceutical, Cosmetic, Chemical, Etc Certifications/Credentials: USPAP, CEA, ASA, MDNA, AMEA Website: www.loebequipment.com State or Country: IL Category: Listing #:56942 (B) [To receive the contact name for this listing, reference the five-digit number which follows each listing and e-mail to FirstList, mergers@firstlist.com.
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