May play a role in apoptosis suppression. In exponentially growing cells, exclusively cytoplasmic. Cell membrane localization is observed when cells reach confluency and during telophase (By similarity). Phosphorylation may play a role in relocalization to the membrane (By similarity). As apoptosis proceeds, degraded via an proteasome-independent pathway, probably by caspases. Belongs to the Niban family. Truncated N-terminus.