Table 1.

Assessment and processing of re-sequencing datasets used in this study

Library	Typea	Original read length (bp)	Number of reads
			Initial purity filtered reads	Remaining after low quality trimming	Remaining after adaptor trimming	Remaining after pairingb
NIAS	SE	36	70,387,992	59,966,207	59,344,842	-
		51	60,164,564	51,717,577	50,981,527	-
CSHL	PE	76	269,062,790	261,197,347	257,096,019	246,779,548 (10,316,471)

^a SE: single-end reads, PE: paired-end reads.

^b The value in parenthesis is the number of unpaired reads for which one of the reads in a pair was discarded during the preprocessing to remove low quality reads.