ID 1.3.1.96 DE Botryococcus squalene synthase. CA H(+) + NADPH + presqualene diphosphate = diphosphate + NADP(+) + CA squalene. CC -!- Isolated from the green alga Botryococcus braunii BOT22. CC -!- Acts in the reverse direction. cf. EC 2.5.1.21, where squalene is CC formed directly from farnesyl diphosphate. DR G0Y287, BOSS_BOTBR ; //