1.14.15.8 adrenodoxin - 693956 1.14.15.8 adrenodoxin dependent on 725584 1.14.15.8 cytochrome P450 - 724061, 725584 1.14.15.8 cytochrome P450meg it is possible to resolve the hydroxylase system into three proteins: a strictly NADPH-dependent FMN-containing flavoprotein (megaredoxin reductase), an iron-sulfur protein (megaredoxin), and cytochrome P-450 (P-450meg). The activity of the 15beta-hydroxylase system is fully reconstituted upon combination of these three proteins and addition of NADPH. Megaredoxin has an apparent sulfur to iron ratio of 0.98 and shows g-signals at 1.90, 1.93, and 2.06 when analyzed by electron paramagnetic resonance spectroscopy 698682 1.14.15.8 Ferredoxin - 724061 1.14.15.8 heme - 696142, 725584 1.14.15.8 heme deoxycorticosterone binds in the heme pocket near the iron ligand 695980 1.14.15.8 heme presence of dehydroabietic acid does not induce a high-spin shift of the enzyme 744706 1.14.15.8 heme steroids beta-estradiol, estrone, pregnenolone and 17alpha-hydroxypregnenolone, do not shift the heme iron into the high-spin form 744148 1.14.15.8 heme the heme content of cytochrome P-450meg is 0.94 nmol of heme per nmol of cytochrome P-450 698682 1.14.15.8 NADPH - 693956, 698684