>3qn0_D mol:protein length:141 6-carboxy-5,6,7,8-tetrahydropterin synthaseMGSSHHHHHHSSGLVPRGSHMMSTTLFKDFTFEAAHRLPHVPEGHKCGRLHGHSFMVRLEITGEVDPHTGWIIDFAELKAAFKPTYERLDHHYLNDIPGLENPTSEVLAKWIWDQVKPVVPLLSAVMVKETCTAGCIYRGE