Mediates cell-cell adhesion in a calcium-dependent manner (By similarity). Able to inhibit growth in several cell lines. By p53/TP53. Both EF-hands are required for function. Probably digested extracellularly by an unknown serine protease generating extremely hydrophobic bioactive peptides. The number of repeats of 17 amino acids in the C-terminal is polymorphic and varies between 3 and 4. The majority of available transcripts lacks one of these repeats. The sequence shown, corresponding to the reference genome (GRCh38/hg38), contains 4 repeats. Truncated C-terminus.