
Real-time quantitative PCR cycle threshold (Cq) values for 22 reference candidates in 20 human tissue RNA samples. The median Cq values are shown as lines, 25 to 75 Cq percentile as Boxes and the range of Cq values from 20 cDNA samples as whiskers. The dotted line separates protein-coding genes (left) from RNA-coding genes (right).










