En enzyme system has been found in peas which converts mevalonic acid to isoprenoid compounds. Among the intermediates in such conversion are mevalonic acid-5-phosphate and pyrophosphate, isopentenyl pyrophosphate and dimethylallylpyrophosphate. Among the products formed by the system are the pyrophosphates of geraniol, farnesol, nerolidol and higher isoprenoid alcohols.

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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1086297PMC
http://dx.doi.org/10.1104/pp.41.1.66DOI Listing

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