>sp|Q7V3V3|URE2_PROMM Urease subunit beta OS=Prochlorococcus marinus GN=ureB MPPLIPGELIPEPGTLELNSNRPTLTLRVANSGDRPIQVGSHFHFFETNTALHFDRDAAR GHRLDIPAGTAIRFEPGDERDVRLVALAGHRKVFGFNGLVNGPLD