Expression levels of uc.283-plus in embryonic stages and adult tissues. (A) Percentage of total uc.283-plus expression in seven different embryonic tissues: ESCs, induced pluripotent stem cells (IPSCs), 7 day and 14 day embryoid bodies (EB7 and EB14), trophoblasts, definitive endoderm and spontaneously differentiating monolayers. (B) Real-time PCR confirms the results of the microarray analysis. Uc.283-plus is expressed at higher levels in mouse ESCs (ES) than in adult tissues, such as spleen, seminal vesicles (SV), thymus, lungs and bone marrow (BM). miR-302 was used as a positive control. Error bars represent standard deviation. **P-values <0.01.