Figure 3. Mmi1 promotes transcription termination of nam1 non-coding gene and prevents nam1 read-through transcription from repressing the downstream MAPKKK gene byr2. (A) Northern blots showing nam1 and byr2 RNA levels during the first 4 hours of sexual differentiation. Ribosomal RNAs (rRNAs) stained with ethidium bromide were used as loading controls. Black lines indicate probes used to detect nam1 and byr2 RNAs. 