Table 1. Summary of data cleaning and length distribution of tags produced by small RNA sequencing.

	Total reads	High quality (%)	3’adapter null (%)	Insert null (%)	5’adapter contaminants (%)	<18 nt (%)	PolyA (%)	Clean reads (%)
RJM	11,828,863	11,787,392 (100)	58,528 (0.50)	2,191 (0.02)	10,811 (0.09)	1,397,442 (11.86)	34 (0)	10,318,386 (87.54)
RJC	10,289,838	10,247,413 (100)	64,104 (0.63)	2,469 (0.02)	5,252 (0.05)	6,82,430 (6.66)	40 (0)	9,493,118 (92.64)