title: DNA sequence repetition in the genome of the American oyster.
abstract: The genome of Crassostrea virignica, the American oyster, has been studied by reassociation kinetics in order to construct a profile of DNA sequence frequency components. Oyster DNA has been shown to contain at least 51% single copy DNA sequences and two classes of middle repetitive DNA. The major repetitive class contains sequences which are repeated on the average 20 times and comprise 29% of oyster DNA. The other class represents 10% of oyster DNA and contains sequences repeated approx. 3000 times. In addition the DNA of oyster contains at least 1% foldback sequences. The spectrum of DNA repetition components in the American oyster is similar to that found in the genomes of other mollusks.
mesh_terms: D000818:Animals; D001483:Base Sequence; D004247:DNA; D005838:Genotype; D007700:Kinetics; D046911:Macromolecular Substances; D008297:Male; D009691:Nucleic Acid Denaturation; D009695:Nucleic Acid Renaturation; D010125:Ostreidae / Q000032:analysis*
chemical_list: D046911:Macromolecular Substances; D004247:DNA