Calcium-binding protein

Calcium-binding proteins are proteins that participate in calcium cell signalling pathways by binding to Ca, the calcium ion that plays an important role in many cellular processes. This calcium ion has unique specific domains that bind to Calcium binding proteins (CBP) and is known to be heterogenous. One of the functions of Calcium binding proteins is to regulate the amount of free (unbound) Ca in the cytosol of the cell. Regulation of Ca(2+) is known as Calcium homeostasis.