>sp|C3N783|GCH3_SULIY GTP cyclohydrolase III OS=Sulfolobus islandicus GN=gch3 MKVLAIKLVDYREWTERLGYDREWLIQKIQNKFMMKIHEIASQYSTFPLQLRFDNFLMIV DGITNTQLIYMINDMQENLPVGIKTCLGYGKTPLEAQWNASVCLNNKEDKFKEYVDEKIA ALHFDINFNTEALKYTSLYDSFLEITNIYVDLSRFLYKIGGILQYLGGDNYLGFVSTNSV NKVIEKFSDDNKIKVGIGIGQNARTAIKLATTSLEKIRNNREKTWHIEEEYH