Bradykinin is also known as kallidin I and callideic I. It is a a hormone
with the chemical
formula of C50
It causes muscle contractions in the lungs, uterus, and intestines. This hormone also forms in blood plasma and can dilate blood vessels (resulting in lowered blood pressure) and make one more sensitive to pain. It also plays a role in inflammation.
This writeup is based on work I did for the science dictionary at http://biotech.icmb.utexas.edu/.