satellite DNA

sat·el·lite DNA

DNA in the satellite regions of acrocentric chromosomes.

satellite DNA

n. A portion of DNA in eukaryotes whose density differs from that of the majority of DNA and that consists of short, repeating sequences of nucleotide pairs, often found near the region of the centromere.

Highly repetitive, non-transcribed DNA regions in eukaryotic chromosomes that have a different sedimentatin coefficient than other nuclear DNA. Satellite DNA contains many thousands to over 100,000 tandem—not inverted—repeats of a short basic motif or repeat unit—commonly 100 to 300 base pairs which occur at a few loci on the genome unit and differ from ‘main band’ DNA

satellite DNA

tandemly repeated DNA, in which the DNA fragments involved form minor ‘satellite’ bands when genomic DNA (see GENOME).is fractionated by DENSITY-GRADIENT CENTRIFUGATION. Satellite bands of eucaryotic DNA fragments are composed of a long series (often hundreds of kb in length) of tandem repeats. There can be several different types of satellite DNA in a particular genome, with repeat units of 5 to 200bp. An example of satellite DNA is the alphoid DNA repeat in the CENTROMERE of eucaryotic CHROMOSOMES. Other types of tandemly repeated DNA are MINISATELLITES and MICROSATELLITES, although they do not appear in satellite bands on density gradients.

单词	satellite dna
释义	satellite DNA satellite DNA n. A portion of DNA in eukaryotes whose density differs from that of the majority of DNA and that consists of short, repeating sequences of nucleotide pairs, often found near the region of the centromere. Translations EncyclopediaSeeDNA satellite DNA sat·el·lite DNA DNA in the satellite regions of acrocentric chromosomes. satellite DNA n. A portion of DNA in eukaryotes whose density differs from that of the majority of DNA and that consists of short, repeating sequences of nucleotide pairs, often found near the region of the centromere. Highly repetitive, non-transcribed DNA regions in eukaryotic chromosomes that have a different sedimentatin coefficient than other nuclear DNA. Satellite DNA contains many thousands to over 100,000 tandem—not inverted—repeats of a short basic motif or repeat unit—commonly 100 to 300 base pairs which occur at a few loci on the genome unit and differ from ‘main band’ DNA satellite DNA tandemly repeated DNA, in which the DNA fragments involved form minor ‘satellite’ bands when genomic DNA (see GENOME).is fractionated by DENSITY-GRADIENT CENTRIFUGATION. Satellite bands of eucaryotic DNA fragments are composed of a long series (often hundreds of kb in length) of tandem repeats. There can be several different types of satellite DNA in a particular genome, with repeat units of 5 to 200bp. An example of satellite DNA is the alphoid DNA repeat in the CENTROMERE of eucaryotic CHROMOSOMES. Other types of tandemly repeated DNA are MINISATELLITES and MICROSATELLITES, although they do not appear in satellite bands on density gradients.
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