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Join date : 2011-03-15

PostSubject: natural polyisoprene content   Sun Jul 10, 2011 2:59 pm

Due to their natural polyisoprene content (1.17.7% by dry weight of fruit bodies),[48] L. volemus fruit bodies can also be used to produce rubber.[49] The chemical structure of rubber from the mushroom consists of a high molecular mass homologue of polyprenol, arranged as a dimethylallyl group, two trans isoprene units, a long sequence of cis isoprenes (between 260300 units), terminated by a hydroxyl or fatty acid ester.[50] Biosynthetically, the creation of the polyisoprene begins with the compound trans,trans-farnesyl pyrophosphate, and is thought to terminate by esterification of polyisoprenyl pyrophosphate.[48] The enzyme isopentenyl-diphosphate delta isomerase has been identified as required for the initiation of rubber synthesis in L. volemus and several other Lactarius species.[51]
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