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Figure S5. miR-181b quantification by real-time RT-PCR with miRNA reference panel. A 10-fold serial dilution of a mixture of synthetic RNA oligonucleotides ranging from 10² to 10⁻⁴ attomols was used to titrate miR-181b by real-time RT-PCR. Attomols of miR-181b (log scale; x axis) versus cell-cycle number (y axis) are represented to generate a standard curve. The linear correlation value is shown.