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. Author manuscript; available in PMC: 2019 Feb 4.
Published in final edited form as: Biomed Pharmacother. 2004 Mar;58(2):100–110. doi: 10.1016/j.biopha.2003.12.006

Fig. 1.

Fig. 1.

In plants and fungi, the central double bond of phytoene has the cis-configuration and an isomerization step is involved to change the central double bond to trans configuration which is subsequently metabolized to lycopene.