Figure 1.

Biosynthetic pathways for the conversion of β-carotene in different organisms. K, β-carotene ketolase. H, β-carotene hydroxylase. From Álvarez et al., 2006, with permission.

Martín et al. Microbial Cell Factories 2008 7:3   doi:10.1186/1475-2859-7-3
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