Satellite DNA

Highly repetitive DNA sequences found in HETEROCHROMATIN, mainly near centromeres. They are composed of simple sequences (very short) (see MINISATELLITE REPEATS) repeated in tandem many times to form large blocks of sequence. Additionally, following the accumulation of mutations, these blocks of repeats have been repeated in tandem themselves. The degree of repetition is on the order of 1000 to 10 million at each locus. Loci are few, usually one or two per chromosome. They were called satellites since in density gradients, they often sediment as distinct, satellite bands separate from the bulk of genomic DNA owing to a distinct BASE COMPOSITION.

Also Known As:

Satellite DNAs; DNA, Satellite; Satellite I DNA; DNA, Satellite I; DNAs, Satellite; DNAs, Satellite I; I DNA, Satellite; I DNAs, Satellite; Satellite I DNAs

Nucleic Acids, Nucleotides, and Nucleosides: 1
- Nucleic Acids: 12179
  - DNA: 148227
    - Satellite DNA: 220
Chemical Phenomena
- Biochemical Phenomena
  - Molecular Structure
    - Base Sequence
      - Nucleic Acid Repetitive Sequences
        Tandem Repeat Sequences
        Satellite DNA: 220
Genetic Phenomena
- Genetic Structures
  - Base Sequence
    - Nucleic Acid Repetitive Sequences
      - Tandem Repeat Sequences
        Satellite DNA: 220
  - Genome
    - Genome Components
      - Intergenic DNA: 344
        Satellite DNA: 220
      - Tandem Repeat Sequences
        Satellite DNA: 220

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