4 clean

Squalene

FIGURĘ 21-37 Ring clcmirc lomob lincar *qualcnc lo the condmsed steroid nucleus. tlw fint slrp in tho Kqucncc n < ataly/cd by a mixed-tunction oxidaw U ir>onoox>genasel, far which ihe co subitrate iv NADPH. The product rv an epoxidc. v\łiich in tho wxi step is cytli/ed to the steroid nucleus. The Imał product o< thosc rcartions in animal cc lis « cholesterol; m other organisms, slighdy differerrt steroli are produced, av vhown.