Fig. 6.

Growth tests of S. cerevisiae yeast cells on solid minimal medium. Medium contained 3 mmol l⁻¹ (NH₄)₂SO₄ or 6.8 mmol l⁻¹ glutamate (positive growth control) as the sole nitrogen source. Wild-type cells (23344c) were transformed with the empty p426 vector (-) and, triple-mepΔ cells (31019b), deprived of the three endogenous Mep proteins, were transformed with the empty p426 vector (-) or, with a multi-copy plasmid (p426) bearing the HsRhCG, or CeRhr1 genes. Cells were incubated for 4 days at 29°C.