dna-dna hybridization between the psr1 and psr2 dnas indicated significant homology between their base sequences , whereas no homology was detected between psr1 and pjdb219 , a chimeric plasmid constructed from a whole molecule of 2-micrometers dna , plasmid pmb9 , and a 1.2-kilobase dna fragment of s. cerevisiae bearing the leu2 gene .
C0012931
constructed
C0012854
dna