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junk DNA

Overview page. Subjects: Genetics and Genomics — Public Health and Epidemiology.

A term sometimes used to refer to the majority of the DNA in most eukaryotic genomes which does not seem to have a coding or regulatory function. Like “junk,” it is of questionable value,...

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reannealing

Overview page. Subjects: Genetics and Genomics — Medicine and Health.

In molecular genetics, the pairing of single-stranded DNA molecules that have complementary base sequences to form duplex molecules. Reannealing and annealing (q.v.) differ in that the DNA...

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reassociation kinetics

Overview page. Subjects: Genetics and Genomics.

A technique that measures the rate of reassociation of complementary strands of DNA derived from a single source. The DNA under study is fragmented into pieces several hundred base pairs in...

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restriction enzyme

Overview page. Subjects: Chemistry.

An enzyme that causes a molecule of foreign DNA to break. Such enzymes occur in many bacteria, where they destroy viruses. Restriction enzymes are used widely in genetic engineering.

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satellite DNA

Overview page. Subjects: Biological Sciences.

The proportion of the DNA of a eukaryotic cell that consists of very large numbers (approximately 106) of copies of a short nucleotide sequence. It occurs mainly around the centromeres and...

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SINE

Overview page. Subjects: Chemistry.

(short interspersed element)

Any of a class of dispersed moderately repetitive DNA found in eukaryotes, consisting of numerous copies (>105) of relatively short (<500 bp) sequences...

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