Peptide sequence: QERYIERAQQ EKEELQQEMA QQSRSLQQAQ QQLEEVRQNR QRADEDVEAA Sequence homology: Cow: 93%; Dog: 93%; Guinea Pig: 83%; Horse: 93%; Human: 100%; Mouse: 93%; Pig: 90%; Rabbit: 93%; Rat: 93%. DEF6, or IBP, is a guanine nucleotide exchange factor f