>sp|P0AAH8|SAPF_ECOLI Putrescine export system ATP-binding protein SapF OS=Escherichia coli GN=sapF MIETLLEVRNLSKTFRYRTGWFRRQTVEAVKPLSFTLREGQTLAIIGENGSGKSTLAKML AGMIEPTSGELLIDDHPLHFGDYSFRSQRIRMIFQDPSTSLNPRQRISQILDFPLRLNTD LEPEQRRKQIIETMRMVGLLPDHVSYYPHMLAPGQKQRLGLARALILRPKVIIADEALAS LDMSMRSQLINLMLELQEKQGISYIYVTQHIGMMKHISDQVLVMHQGEVVERGSTADVLA SPLHELTKRLIAGHFGEALTADAWRKDR