A. The pCMV-luc-3′UTRc-Myb reporter gene is illustrated [with the list of miR binding sites]. The construct was generated by introducing the 1.2 kb 3′UTR of c-Myb into pMIR-Report-luc. B. pCMV-luc-3′UTRc-Myb was transfected into UT7/TPO cells with miR150, miR195 or a negative miR control. After 24 hr, luciferase activity was assessed in duplicate cultures. Values reported are the mean ± S.E.M. of three separate experiments and reported as relative luciferase activity between the various conditions. The same vector, but without the 3′UTR of c-myb (pCMV-luc), were also utilized as controls, and results are shown. C. pCMV-luc-3′UTRc-Myb was transfected into UT7/TPO cells with anti-miR150, anti-miR195 or a negative anti-miR control. After 24 hr luciferase activity was assessed in duplicate cultures and is reported as the mean ± S.E.M. of three separate experiments. The same controls as in figure 3B were performed. pCMV-luc-3′UTRc-Myb was also transfected into the cells with miR negative control and anti-miR negative control, and these gave the same values as the vector without the 3′UTRcMyb (data not shown).