Figure 4.

Mapping bisulfite reads to 4 possible bisulfite strands (BSW/BSWR/BSC/BSCR) is equivalent to mapping the bisulfite read and its reverse complementary read to both Watson/Crick strands of the original reference sequence.

Xi and Li BMC Bioinformatics 2009 10:232   doi:10.1186/1471-2105-10-232
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