Figure 1.
An overview of the cholesterol synthesis from squalene. Intermediate reactions from lanosterol to desmosterol and lathosterol in the Bloch pathway and Kandutsch-Russell pathway respectively are not shown. Sterol-C5-desaturase-like (SC5DL) converts lathosterol into 7-dehydrocholesterol. The 24-dehydrocholesterol reductase (DHCR24) catalyzes the reduction of the delta-24 double bond of sterol intermediates in the Bloch pathway forming a sterol which is part of the Kandutsch-Russell pathway. DHCR24 also catalyzes the formation of cholesterol from desmosterol.