(A) Nuclease protection assay with probe MER-R (light gray bars), MER-A (dark gray bars), and MER-B (black bars), with 5, 10, and 30 μg of total RNA in each case. Quantitative analysis in relative intensity units (RIU) was done with the ImageQuant Software (Molecular Dynamics). (B) Intensity relative to a total intensity of 100%.