Structural organization of the genome of the cellular slime mold Dictyostelium discoideum: interspersion of repetitive and single-copy DNA sequences
- PMID: 1171729
- DOI: 10.1016/0092-8674(75)90059-8
Structural organization of the genome of the cellular slime mold Dictyostelium discoideum: interspersion of repetitive and single-copy DNA sequences
Abstract
The length and interspersion of reiterated and single-copy DNA sequences in Dictyostelium have been examined. The results indicate that approximately 50-60% of the single-copy sequences in DNA fragments 1500 nucleotides long and 75% of the single-copy sequences in fragments 3000 nucleotides long are linked to short interspersed repeat DNA sequences. The average length of these single-copy sequences is 1500 nucleotides. The length of the reiterated DNA has also been analyzed and shows a bimodal distribution. One half is present in sequences greater than 2000 nucleotides long, while the remainder is present as short fragments 250-450 nucleotides long. These shorter fragments are interspersed with the bulk of the single-copy DNA.
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