>sp|Q8ZU20|GCH3_PYRAE GTP cyclohydrolase III OS=Pyrobaculum aerophilum GN=gch3 MHKITLIRLRGYREWTESLGPRREHIIQTVQAKIHSALWKYFTSIGALPHHLRYDFSLAL TTNIETGRVGEVVAKIKRISPVDVEFCEGVGRTPREAYENCGATPGESAGVSVVAHMDVV DSTAATNKNGPLYVYRLIQRTISTIDSGCENLGCLAFYLGGDNIMLLLPNVDAIYQVLRD VELSVRVGVGVAKKPYNAFVKATRGLDYMRVKGRVGVKVVK