title: Polymorphic variations in the ori sequences from the mitochondrial genomes of different wild-type yeast strains.
abstract: We determined the restriction maps and primary structures of two as yet poorly characterized regions of the mitochondrial genomes of different wild-type strains of Saccharomyces cerevisiae. These regions respectively comprised the ori1 sequence and the newly identified ori8 sequence. Ori1 and ori8, together with their flanking sequences, exhibit a large polymorphism, resulting from specific variations due to insertions or deletions of optional GC clusters at different locations. The mechanisms underlying such sequence rearrangements are discussed.
mesh_terms: D001483:Base Sequence; D004261:DNA Replication; D004271:DNA, Fungal / Q000235:genetics*; D004272:DNA, Mitochondrial / Q000235:genetics*; D005800:Genes, Fungal; D008969:Molecular Sequence Data; D005810:Multigene Family; D011110:Polymorphism, Genetic; D012150:Polymorphism, Restriction Fragment Length; D012441:Saccharomyces cerevisiae / Q000235:genetics*
chemical_list: D004271:DNA, Fungal; D004272:DNA, Mitochondrial