Resolution: standard / high

Figure 3.

Building a new series of operations to replace

<a onClick="popup('http://www.biomedcentral.com/1471-2105/13/S19/S13/mathml/M53','MathML',630,470);return false;" target="_blank" href="http://www.biomedcentral.com/1471-2105/13/S19/S13/mathml/M53">View MathML</a>

. O_iwill be skipped and

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will mimic O_k_{+ 1}for k = i, i +1, ..., j -2. Finally,

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and O_jwill be constructed according to O_j.

Shao and Lin BMC Bioinformatics 2012 13(Suppl 19):S13 doi:10.1186/1471-2105-13-S19-S13