FIG. 6.

Deletion of PNT1 prevents respiratory growth of strains expressing Cox2p fusion proteins but not wild-type Cox2p. Each strain was streaked on YPD and YPEG, and the plates were incubated at 30°C for 4 or 5 days, respectively. The relevant nuclear genotypes (PNT1 or pnt1Δ) and mitochondrial genotypes (COX2, COX2::ARG8^m or COX2::BLE^m) are indicated for each sector.