title: A comparison of small circular DNA molecules in psi+ and psi- strains of Saccharomyces cerevisiae.
abstract: The psi+ and psi- phenotypes, which affect the efficiency of ochre suppression in yeast, are inherited in a non-Mendelian fashion. There is no apparent difference in length or in length distribution of 2 micronm circular DNA molecules between psi+ and psi- strains. It seems that the psi genetic determinant is probably not connected with the presence or absence of these small circular DNA molecules.
mesh_terms: D004270:DNA, Circular / Q000235:genetics; D008970:Molecular Weight; D009154:Mutation; D010641:Phenotype; D012441:Saccharomyces cerevisiae / Q000235:genetics*; D013045:Species Specificity
chemical_list: D004270:DNA, Circular