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Figure 1.
GO Colour-Coding. There are 2 red nodes (removed nodes), 3 pink nodes (modified nodes), and a number of blue nodes (added nodes) and gray nodes (unchanged nodes) computed from June 2006 GO version and August 2006 GO version.
Park et al. BMC Bioinformatics 2008 9(Suppl 3):S7 doi:10.1186/1471-2105-9-S3-S7