Involved in oxygen transport from the lung to the various peripheral tissues.
LVV-hemorphin-7 potentiates the activity of bradykinin, causing a decrease in blood pressure.
Spinorphin:functions as an endogenous inhibitor of enkephalin-degrading enzymes such as DPP3, and as a selective antagonist of the P2RX3 receptor which is involved in pain signaling, these properties implicate it as a regulator of pain and inflammation.