phosphodiesterase 5 pde5 enzyme. inhibition of this enzyme is the mechanism of action of sildenafil, tadalafil and vardenafil,.

phosphodiesterase pde5 enzyme inhibition this mechanism action sildenafil tadalafil vardenafil pdb1udt fosfodiesterase ester erection erectile dysfunction pde corpus cavernosum structure peptide protein amino acid molecule polypeptide polymer atoms science scientific disease health molecular model used treat shown as colorcoded spheres cartoon