Reaction catalyzed by rubber cis-polyprenylcistransferase (2.5.1.20)
+
+
cis-1,4-polyisoprene
=
+
isopentenyl diphosphate
+
farnesyl diphosphate
+
cis-1,4-polyisoprene
=
diphosphate
+
a poly-cis-polyprenyl diphosphate longer by one C5 unit
