the plasmids studied are adr2-bs-pbr322 ( the vector pbr322 + the yeast gene adr2 ) , adr3-5c-yrp7 ( containing yeast trp1 , a constitutive mutant of yeast adr2 , a fragment of 5 kilobases of unanalyzed chromosomal dna and the vector pbr322 ) , and p31 ( pbr322 + a yeast dna fragment encompassing the right moiety of the ty1 element and its in vivo promoter ) .
C0000702
a
C0012854
dna