>1n3r_J mol:protein length:221 GTP cyclohydrolase I PSLSKEAALVHEALVARGLETPLRPPVHEMDNETRKSLIAGHMTEIMQLLNLDLADDSL METPHRIAKMYVDEIFSGLDYANFPKITLIENKMKVDEMVTVRDITLTSTCESHFVTID GKATVAYIPKDSVIGLSKINRIVQFFAQRPQVQERLTQQILIALQTLLGTNNVAVSIDA VHYCVKARGIRDATSATTTTSLGGLFKSSQNTRHEFLRAVRHHN