[1] ζ-Carotene is similar in structure to lycopene, but has an additional 4 hydrogen atoms.

ζ-carotene can be used as an intermediate in forming β-carotene.

[2] A dehydrogenation reaction converts ζ-carotene into lycopene, which then can be transformed into β-carotene through the action of lycopene beta-cyclase.

[3][4] ζ-Carotene is a natural product found in Lonicera japonica and Rhodospirillum rubrum.

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