Peptide sequence: HYRSHLEEKP YECNECGKTF NLNSAFIRHR KVHTEEKSHE CSECGKFSQL Sequence homology: Cow: 100%; Dog: 100%; Guinea Pig: 100%; Horse: 100%; Human: 100%; Mouse: 93%; Rabbit: 79%; Rat: 100%. RBAK encodes a nuclear protein which interacts with the tumo