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Relative abundances of tRFs. (A) The 3 classes of tRFs aligned to the tRNA precursor. (B) Total numbers of sequence reads with perfect matches to each of the tRF classes, together with 5′ and 3′ isoforms (see Table S2 in the supplemental material). (C) Sequence reads for tRFs with a total of at least 50 sequence reads summed among the 4 libraries.
