>sp|A1S528|RIBA_SHEAM GTP cyclohydrolase-2 OS=Shewanella amazonensis GN=ribA MSIKYVATSKLPTPWGVFAMHGFEDSETGKEHVALTFGDLSGDAPVLGRIHSECLTGDAL FSLRCDCGFQLQTAMQRIAETGRGFILYLRQEGRGIGLLNKIRAYELQDKGANTVEANEQ LGFAADMRKYDMIAPMLAHLGISRVKLMTNNPRKVNAMKDVGMDVVERVPLQVGKNRYNE AYLKTKSDKLGHMMSEEHFKAQHQD