FIG. 2.

Northern blot analysis of MDV microRNAs in tumors produced by vv (RB1B) and vv+ (615K) strains of MDV. Representative samples from different chickens (numbered 1 and 2 for each virus) are shown. Similar relative differences were noted for other samples with lower viral loads. U6 hybridization served as a control for RNA loading. Differences in signal intensities for different microRNAs are not an indication of relative expression since exposure time, probe-specific activities, and hybridization properties all vary.