Immunogen sequence: MGSSSEASFR SAQASCSGAR RQGLGRGDQN LSVMPPNGRA QTHTPGWVSP CSENRDGLLP ATAPGRLCSH RGADIPSFQT HQDPVTASGS SELHADCPQF RALDRAGN. The novel protein p53AIP, p53-regulated apoptosis-inducing protein 1, has been identified from the direct cloning