Assertion: carotenoid | /r/MadeOf | isoprene units
Facets:
Source sentences:
text: The carotenoids that contain only isoprene units are called carotenes such as α-, β-, and γ-carotene and lycopene, while those having oxygen in addition to the hydrocarbon chain are known as xanthophylls or oxygenated carotenoids such as lutein and zeaxanthin.