Fig. 1From: Molecular breeding of Saccharomyces cerevisiae with high RNA content by harnessing essential ribosomal RNA transcription regulatorSchematic of a rDNA unit in S. cerevisiae. rDNA cluster is located at chromosome XII in S. cerevisiae. rDNA repeats consists of 100–150 copies. Each rDNA unit contains two transcribed regions, 35S precursor rRNA and 5S rRNA, and two intergenic non-transcribed spacers, NTS1 and NTS2. RFB, replication fork barrier siteBack to article page