title: Repeated DNA sequences in fungi.
abstract: Several fungal species, representatives of all broad groups like basidiomycetes, ascomycetes and phycomycetes, were examined for the nature of repeated DNA sequences by DNA:DNA reassociation studies using hydroxyapatite chromatography. All of the fungal species tested contained 10-20% repeated DNA sequences. There are approximately 100-110 copies of repeated DNA sequences of approximately 4 x 10(7) daltons piece size of each. Repeated DNA sequence homoduplexes showed on average 5 degrees C difference of T(e)50 (temperature at which 50% duplexes dissociate) values from the corresponding homoduplexes of unfractionated whole DNA. It is suggested that a part of repetitive sequences in fungi constitutes mitochondrial DNA and a part of it constitutes nuclear DNA.
authors.forename: S K
authors.initials: SK
authors.lastname: Dutta
mesh_terms: D004271:DNA, Fungal / Q000737:chemistry / Q000235:genetics*; D006358:Hot Temperature; D007700:Kinetics; D009693:Nucleic Acid Hybridization; D012091:Repetitive Sequences, Nucleic Acid; D013045:Species Specificity
chemical_list: D004271:DNA, Fungal