This gene product shares a high degree of sequence similarity with DNA-dependent protein kinase catalytic subunit-interacting protein 2 in human and mouse, and like them may bind the catalytic subunit of DNA-dependent protein kinases. The exact function of this gene is not known. Alternative splicing results in multiple transcript variants.CIB3 (Calcium And Integrin Binding Family Member 3) is a Protein Coding gene. GO annotations related to this gene include calcium ion binding. An important paralog of this gene is CIB2.