Oral Presentation: no. OP9OBJECTIVES: Divalent manganese is a cofactor for soluble guanylyl cyclase (sGC), the enzyme producing cyclic GMP in vascular smooth muscle cells that causes relaxation. Manganese competes with magnesium to activate sGC. These divalent cations can bias the activity of the enzyme to produce cyclic nucleotides other than cyclic GMP, in particular cyclic AMP and cyclic IMP. Cyclic IMP, preferably produced in the presence of magnesium, can cause contraction in ...postprin
