>tr|F0NPW9|F0NPW9_SACI0 GTP cyclohydrolase III OS=Saccharolobus islandicus GN=gch3 MKVLAIKLVDYREWTERLGYDREWLIQKIQNKFMMKIHEIASQYSTFPLQLRFDNFLMIV DGITNTQLIYMINDMQENLPVGIKTCLGYGKTPLEAQWNASVCLNNKEDKFKEYVDEKIA ALHFDINFNTEALKYTSVYDSFLEITNIYVDLSRFLYKIGGILQYLGGDNYLGFVSTNSV NKVIEKFSDDNKIKVGIGIGQNARTAIKLATTSLEKIRNNREKTWHIEEE