>1HXR_1|Chains A, B|GUANINE NUCLEOTIDE EXCHANGE FACTOR MSS4|Rattus norvegicus (10116) ELVSAEGRNRKAVLCQRCGSRVLQPGTALFSRRQLFLPSMRKKPDLVDGSNPDGDVLEEHWLVNDMFIFENVGFTKDVGNVKFLVCADCEIGPIGWHCLDDKNSFYVALERVSHE