Response elements named for this compound can be found in the promoter region of the Dicer gene, where it can be bound by RXR. This compound is hydroxylated (-5[1])in the 25-position (-5[1])by an enzyme that is regulated (10[1])by the secretion of PTH. Corticosteroids like dexamethasone (-5[1])decrease (10[1]-5[1])levels of this compound (10[1]-5[1])in the body (-5[4])by regulating this compound’s namesake receptor. (-5[5])A derivative (-5[2])of this compound (-5[1])called (-5[2])calcipotriol (10[1]-5[2])is used (10[1])to treat psoriasis. (-5[2])Bowed legs and bone fractures (10[7]-5[1])can (10[1])result (10[1]-5[1])from a deficiency (10[5]-5[1])of this (10[1]-5[1])compound (10[3]-5[11])called (10[1]-5[2])rickets. (10[16]-5[6])This (10[2]-5[1])compound (10[9]-5[2])can (10[3]-5[1])be (10[2])synthesized (10[1])in the body (10[1])from 7-dehydrocholesterol (10[2])in the presence of (10[1])UVB (10[3])radiation. (10[8])For (10[1])10 points, (10[1])what fat-soluble (10[1])vitamin (10[1])is (10[1])synthesized (10[2])through (10[1])exposure (10[1])to sunlight? (10[10])■END■ (10[36]0[1])