Figure 1.

Graph alignment.a) An alignment <a onClick="popup('http://www.biomedcentral.com/1752-0509/6/144/mathml/M2','MathML',630,470);return false;" target="_blank" href="http://www.biomedcentral.com/1752-0509/6/144/mathml/M2">View MathML</a>between two graphs is an injective one-to-one mapping (indicated by dashed lines) between the vertices of two graphs (see text). b) The interpretation of vertices and edges depends on the type of biological networks in comparison.

Kolář et al. BMC Systems Biology 2012 6:144   doi:10.1186/1752-0509-6-144
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