Required for synthesis of steroid hormones, for olfactory sensory behavior and completion of the second larval molt (a steroid mediated developmental transition) and pupariation. H(+) + NADP(+) + 2 reduced [adrenodoxin] = NADPH + 2 oxidized [adrenodoxin] Steroid metabolism; cholesterol metabolism. Expressed predominantly in prothoracic gland of the larval ring gland and nurse cells of the adult ovary. Low expression is all adult tissues examined. Belongs to the ferredoxin--NADP reductase type 1 family.