Dolbier HW Solutions 641

Dolbier HW Solutions 641 - 735 LIPIDS 26.8 -Carotene is a...

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26.8 b -Carotene is a tetraterpene because it has 40 carbon atoms. The tail-to-tail linkage is at the midpoint of the molecule and connects two 20-carbon fragments. 26.9 Isopentenyl pyrophosphate acts as an alkylating agent toward farnesyl pyrophosphate. Alkylation is followed by loss of a proton from the carbocation intermediate, giving geranylgeranyl pyrophos- phate. Hydrolysis of the pyrophosphate yields geranylgeraniol.
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