... ofthe pos5 cell on SG solid medium and on and in solid and liquid media lacking arginine (Fig. 5 and Table 6),thereby supporting the partial contribution of Utr1p and Yef1p to mitochondrial functions ... of themutants for UTR1, YEF1 and POS5.Themutants and WT cells were treated and spotted on SD and YPD solid media as des-cribed in Fig. 4A and were grown at 30 °C and 37 °C as indicated.Fig. ... single,double and triple mutants, which was unexpectedly found to be viable, forUTR1, YEF1 and POS5 demonstrated the critical contribution of Pos5p tomitochondrial function and survival at 37 °C and...