two strains were found that did not contain detectable levels of 2micro dna , and two strains contained 2micro dna molecules having only one ecori restriction endonuclease recognition site rather than the usual two.-a haploid containing 2micro dna with one ecori restriction site was mated with a haploid containing 2micro dna with two ecori restriction sites and the resulting diploid maintained both types during vegetative growth .
C0000702
a
C0012854
dna