>sp|Q0I4A3|RIBA_HISS1 GTP cyclohydrolase-2 OS=Histophilus somni GN=ribA MSKIQLVAEAKLPTEFGIFRIVGFEFPDTQKEHVALVMGDINDDKPVLARIHSECLTGDA LHSLKCDCGFQLATALRQISEAGRGVLIYHREEGRGIGLINKIRAYALQDQGLDTIEANL ALGFAADERNFSVCADIFALLGVKQVRLLTNNPNKIETMKKSGINIVERVPLNVGENRYN TEYLDTKAKKMGHFIVHNNEQHLIACPHCQEEIPKK