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Repeated sequence DNA or repetitive DNAis any segment of DNA containing duplicated sequences of base pairs. These sequences may be short (say 10 base pairs long) and extended with hundreds of base pairs repeated. The majority of repetitions do not code for proteins but is found among so called junk DNA.
In the study of DNA sequences, one can distinguish two main types of repeated sequence:
- Tandem repeats:
- Interspersed repeats:
In primates, the majority of LINEs are LINE-1 and the majority of SINEs are Alu's.
In prokaryotes, CRISPR are arrays of alternating repeats and spacers.
Other types of repeatsEdit
Note: The following are covered in detail in "Computing for Comparative Microbial Genomics".
- Direct repeats
- Global direct repeat
- Local direct simple repeats
- Local direct repeats
- Local direct repeats with spacer
- Inverted repeats
- Global inverted repeat
- Local inverted repeat
- Inverted repeat with spacer
- Palindromic repeat
- Mirror and everted repeats
- ↑ (2008-12-22) "Word Frequencies, Repeats, and Repeat-related Structures in Bacterial Genomes" Computing for Comparative Microbial Genomics: Bioinformatics for Microbiologists, 1, 133–144, Springer.
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