Figure 2.

Distribution of carnation transcripts in the carotenoid biosynthesis pathway. Previously published sequences in GenBank belonging to the carotenoid biosynthesis pathway were used in BLAST searches to identify genes in the carnation EST database. Each enzyme name is followed in parentheses by the number of contigs homologous to gene families encoding this enzyme. IPI, isopentenyl pyrophosphate isomerase; GGDP, geranylgeranyl diphosphate synthase; PSY, phytoene synthase; PDS, phytoene desaturase; ZDS, ζ-carotene desaturase; LCYB, lycopene β-cyclase; LCYE, lycopene ϵ-cyclase; CHYB, β-ring hydroxylase; CHYE, ϵ-ring hydroxylase; ZEP, zeaxanthin epoxidase; VDE, violaxanthin de-epoxidase; CRTISO, carotenoid isomerase; NSY, neoxanthin synthase; NCED, 9-cis-epoxycarotenoid dioxygenase.