MeSH definition : The first committed enzyme of the biosynthesis pathway that leads to the production
of STEROLS. it catalyzes the synthesis of SQUALENE from farnesyl pyrophosphate via
the intermediate PRESQUALENE PYROPHOSPHATE. This enzyme is also a critical branch
point enzyme in the biosynthesis of ISOPRENOIDS that is thought to regulate the flux
of isoprene intermediates through the sterol pathway.;
The first committed enzyme of the biosynthesis pathway that leads to the production
of STEROLS. it catalyzes the synthesis of SQUALENE from farnesyl pyrophosphate via
the intermediate PRESQUALENE PYROPHOSPHATE. This enzyme is also a critical branch
point enzyme in the biosynthesis of ISOPRENOIDS that is thought to regulate the flux
of isoprene intermediates through the sterol pathway.