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Reconstruction of tetraterpenoid biosynthesis in B. brauniiShowa. 42, lycopene; 43, zeaxanthin; 44, violaxanthin; 45, lutein; 46, trans,trans-lycopadiene. CrtI, phytoene desaturase; CrtP, 15-cis-phytoene dehydrogenase; CrtQ, ζ-carotene desaturase; CrtH, prolycopene isomerase; CrtY, lycopene β-cyclase; CrtR, β-carotene 3-hydroxylase; ZEP, zeaxanthin epoxidase; VDE, violaxanthin de-epoxidase; CrtL2, lycopene ε-cyclase; LUT1, carotene ε-monooxygenase, ?, unidentified enzyme(s).
