4.2.3.B17	hanging drop method, crystallographic analyses of wild-type enzyme and a promiscuous mutant, with unreactive 2-fluoro analogues ((2E,6E)-2-fluorofarnesyl diphosphate and (2Z,6E)-2-fluorofarnesyl diphosphate) of (2E,6E)- and (2Z,6E)-farnesyl diphosphate reveals catalytically relevant binding modes and distinct farnesyl chain topologies that are consistent with preorganization by the active-site for cisoid or transoid cyclization	701441