>sp|A8APU9|URE2_CITK8 Urease subunit beta OS=Citrobacter koseri GN=ureB MIPGEYRISTGNIAINTGRETCTIVVENHGDRPVQVGSHYHFYEVNPALRFDRQAARGFR LNIPAGTAVRFEPGQKREVELVRVAGAQRIFGFRGEVMGSLEADND