>4u2d_A mol:protein length:236 CarboxymethylenebutenolidaseMLTEGISIQSYDGHTFGALVGSPAKAPAPVIVIAHEILGVNAFMRETVSWLVDQGYAAVCPDLYARQAPGTALDPQDEAQREQAYKLWQAFDMEAGVGDLEAAIRYARHLPYSNGKVGLVGYSLGGALAFLVAAKGCVDRAVGYCGVGLEKQLDKVPEVKHPALFHMGGQDHFVPAPSRQLITEGFGANPLLQVHWYEGAGHSFARTGSSDYVASAAALANERTLDFLAPLQSKKP