Peptide sequence: ETHRGWGREQ TPQETEPEAA QRHDPAPRNP APHGVSWVKG PLSPEVDHPG Sequence homology: Human: 100%. Guanine nucleotide exchange factor (GEF) for RAB5A and RAB22A that activates RAB5A and RAB22A by exchanging bound GDP for free GTP. Plays a role in e