Hybridization of total DNA from various CBS 2359/152F transformants with URA genes. The membranes were hybridized with ScURA (upper band) and KlURA (lower band). Lanes M, HindIII-digested λ DNA; lane 1, KlARO8.2; lane 2, KlAAT2; lane 3, KlAAT1; lane 4, KlARO8.1; lane 5, pCXJ10; lane 6, KlBAT1; lane 7, KlARO9; lane 8, pCXJ10. The sizes (in bp) of the HindIII-digested λ DNA fragments are indicated on the left and on the right.