The human survivin gene was first cloned and described by Ambrosini et al. in 1997 as a unique and smallest member of inhibitor of apoptosis protein family (IAP) (Ambrosini et al. 1997). IAPs are diverse group of signaling molecules with wide range of physiological role, from the inhibition of apoptosis to cell cycle progression. IAPs have nine family members: X-linked IAP, cIAP1, cIAP2, neuronal apoptosis inhibitor protein, melanoma IAP, IAP-like protein 2, livin, apollon, and survivin. The first IAP was isolated as a baculovirus gene product and identified by the presence of baculovirus IAP repeat (BIR). All the members of IAP family are generally characterized by presence of one or more copies of BIR at N-terminus and ring finger domain at their carboxyl...