This conceptual mode of action animation is of the drug Viagra developed by Pfizer pharmaceuticals. Viagra functions by inhibiting the enzyme phosphodiesterase-5 PDE-5. Under normal conditions PDE-5 converts cyclic-GMP cGMP into GMP shown as green and red spheres. Viagra selectively inhibits PDE-5 by blocking the site where cGMP binds. As a result, the cellular concentration of cGMP increases, causing an increase in blood flow to the corpus cavernosum. www.scianafilms.com
Channels: Scientific Animations Others Medical
Tags: viagra
Uploaded by: sertan ( Send Message ) on 05-01-2008.
Duration: 0m 28s