>sp|A6VGP7|PURO_METM7 IMP cyclohydrolase OS=Methanococcus maripaludis GN=purO MYIGRFLVLGKTDEGNPFVTYRVSSRSFPNRVAKVMDDNTVAILPKDLEEMFKNPYITYN CVKLVGDVAIATNGSHTDIIADKIKLGLPIRDALSYSLLTMDYEKDDYNTPRIAVVLTKD SAYMGYVSENDVRIKKVELESGKAYYLSVYEACNITKHQVISVAGKTAEEVTKFVMDYEE FEKPVTAATVLLKDGFKLATL