Table 1. Prevalence of structures containing a microRNA precursor from SHAPE-based analysis of BHRF1 transcripts.

Transcript	Number of energetically most favorable structures	Number of structures containing a pre-miRNA	% of ‘processable structures’
miR-2_B9	12	11	92%
miR-2_B10	13	13	100%
miR-3_C9	17	5	29%
miR-3_C10	17	6	35%

SHAPE analysis was performed in duplicates for both miRNAs and percentages were calculated by dividing the number of predicted structures showing a miRNA precursor by the number of all energetically favorable structures.