>sp|Q21SZ4|URE2_ALBFT Urease subunit beta OS=Albidiferax ferrireducens GN=ureB MIPGELFTDGPEHVLNPGRRAHTLAVVNASDRPIQVGSHYHFAETNGALGFDRAAAKGMR LNIASGSAVRLEPGQQRTVELVDYAGDRIVYGFRGLTQGAL