This gene encodes a calcium-binding protein belonging to
the penta-EF-hand protein family. Calcium binding is important for
homodimerization and for conformational changes required for
binding to other protein partners. This gene product participates
in T cell receptor-, Fas-, and glucocorticoid-induced programmed
cell death. In mice deficient for this gene product, however,
apoptosis was not blocked suggesting this gene product is
functionally redundant.