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5 component system: The ATP-binding Cassette (ABC) Superfamily

P0AEU0 Histidine-binding periplasmic protein
P07109 Histidine transport ATP-binding protein HisP
P0AEU3 Histidine transport system permease protein HisM
P52094 Histidine transport system permease protein HisQ
P09551 ArgT aka B2310