Table 1. Comparison of FuncTree’s key features with other visualization tools.

Function category	Functions subcategory	Web server
		Functree	iPath 2.0	KEGG Atlas	PathwayProjector
User Interface	zoom/pan	o	o	o	o
	mouse over popup	o	o	o	o
Visual customization	Size	o	o		o
	Color	o	o	o	o
	opacity	o	o
Functional calculation	Functional reconstruction	o
	Statiscal enrichment	o
Input data type	KEGG orthology	o	o	o	o
	KEGG pathway	o		o	o
	KEGG module	o		o	o
	KEGG gene	o
	COG/eggNOG		o
	UniProt		o
	NCBI gene ID		o
	Multi-point data	-			o
Data output	SVG	o	o	o	o
	Table	o
Functional visualization	Hierarchical Overview	o
	Pathway	o	o	o	o
	Module	o	o	o
	KO	o	o	o