Fig. 4
Some value-added compounds produced by microalgae. a Astaxanthin, a strong antioxidant produced by the microalga Haematococcus pluvialis. b β-Sitosterol, produced by various genera of micro algae. Different species of Glaucocystophyte produce β-sitosterol. c Microcolin-A, an immunosuppressive agent produced by the microalga Lyngbya majuscule. d Docosahexaenoic acid DHA produced by the engineered strain of diatom Phaeodactylum tricornutum. e Structure of vitamin E (tocopherols), the microalga Haslea ostrearia naturaly produce vitamin E. f Chemical structure of okadaic acid, an anti-fungal agent produced by some species of dinoflagellates. g Chemical structure of microcystin-LR, produced by the blooming Microcystis aeruginosa