Small RNA (sRNA) profiles in four suspect virus-infected tomato samples.

<p><b>A</b>. Enrichment of a virus-like siRNA pool through subtraction of host tomato sRNAs. <b>B</b>. Enriched virus-like sRNAs matching known virus and viroid genomes. <b>C</b>. Size distribution of total sRNAs (from 15 to 36 nt) in the four samples. <b>D</b>. After subtracting host sRNAs, size distribution of siRNAs in each library against respective virus and viroid.