. . . . "2 (2E,6E)-farnesyl diphosphate → presqualene diphosphate + diphosphate"^^ . "Squalene synthase"^^ . "2 (2E,6E)-farnesyl diphosphate → presqualene diphosphate + diphosphate"^^ . "Presqualene-di-diphosphate synthase"^^ . "Farnesyltransferase"^^ . "2.5.1.21"^^ . . . . . . . "2 (2E,6E)-farnesyl diphosphate → presqualene diphosphate + diphosphate"^^ .