Figure 1.

Read sequence distribution. The occurrence frequencies of sequences in raw data file 1.fq (shown in the upper graph) and 2.fq (shown in the lower graph) show that although the majority of the read sequences have 6-21 occurrences, high occurrence reads exist in both raw read files.

Jiang et al. Virology Journal 2011 8:194   doi:10.1186/1743-422X-8-194
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