>4grd_B mol:protein length:173 Phosphoribosylaminoimidazole carboxylase catalytic subunitMSEIQTAHTHSAPLVGVLMGSSSDWDVMKHAVAILQEFGVPYEAKVVSAHRMPDEMFDYAEKARERGLRAIIAGAGGAAHLPGMLAAKTTVPVLGVPVASKYLKGVDSLHSIVQMPKGVPVATFAIGEAGAANAALFAVSILSGNSVDYANRLAAFRVRQNEAAHAMVLPPLE