text: Although neither activation of BCK1 (MEKK) by the dominant BCK1-20 mutation nor increased dosage of MKK1 (MEK) or MPK1 (MAP kinase) mimicked PKC1 as a glc7-10 dosage suppressor, extra copies of genes encoding upstream components of the Pkc1p pathway such as ROM2, RHO2, HCS77/WSC1/SLG1 and MID2 also suppressed glc7-10 effectively.