Table 2. The extended terpenoid phenotypic module in Arabidopsis, including triterpene- specific (C₃₀) synthases.

Gene ID	Annotation	Description A	Tandem duplicate	Bowers pair B	Reference C
Methylerythritol phosphate (MEP) pathway
AT4G15560	DXPS2	Desoxy-xylulosephosphatesynthase 2	Yes	A15N013	Lange et al., 2003
Triterpene-specific synthases
AT1G62730	-	N/A; Squalene/phytoene synthase	No	-	Wang et al., 2008
AT1G66960	LUP5	Lupeol synthase 5	Yes	-	Herrera et al., 1998
AT1G78480	-	N/A; Prenyltransferase/squalene oxidase	Yes	-	Hanada et al., 2010
AT1G78500	PEN6	Pentacyclic triterpene synthase 6	Yes	-	Husselstein-Muller et al., 2001
AT1G78950	LUP4	Lupeol synthase 4	Yes	-	Benveniste et al., 2002
AT1G78955	CAMS1	Camelliol synthase 1	Yes	-	Kushiro et al., 1998
AT1G78960	LUP2	Lupeol synthase 2	Yes	-	Herrera et al., 1998
AT1G78970	LUP1	Lupeol synthase 1	Yes	-	Herrera et al., 1998
AT3G29255	-	N/A; Squalene cyclase (InterPro:IPR018333)	Yes	-	this manuscript
AT2G07050	CAS1	Cycloartenol synthase 1	-	-	Lange et al., 2003
AT3G45130	LAS1	Lanosterol synthase 1	-	-	Benveniste et al., 2002
AT4G15340	PEN1	Pentacyclic triterpene synthase 1	Yes	-	Husselstein-Muller et al., 2001
AT4G15370	PEN2	Pentacyclic triterpene synthase 2	Yes	-	Husselstein-Muller et al., 2001
AT5G36150	PEN3	Pentacyclic triterpene synthase 3	-	-	Husselstein-Muller et al., 2001
AT5G42600	MRN1	Marernal Synthase 1	-	-	Benveniste et al., 2002
AT5G48010	THAS1	Thalianol Synthase 1	Yes	-	Benveniste et al., 2002
Function not clear
AT1G48820	-	N/A; tandem duplicate of TPS28	Yes	-	Lange et al., 2003
AT2G37140	-	N/A; best BLAST hit is TPS1	-	-	Lange et al., 2003

Three letter gene abbreviations are adapted from the Arabidopsis Information Resource ^A .

^A TAIR10, www.arabidopsis.org, last accessed on December 13th, 2014.

^B Ohnolog pair according to Bowers et al., 2003.

^C For a comprehensive review, see Tholl and Lee, 2011.