2.1.3.9	crystal structure in presence and absence of N-acetylcitrulline	
2.1.3.9	purified recombinant enzyme in binary complex with its substrates, carbamoyl phosphate or N-acetyl-L-ornithine, and in ternary complex with carbamoyl phosphate and N-acetyl-L-norvaline, hanging drop vapour diffusion method, preparation by mixing of 0.002 ml of 12 mg/ml protein solution with an equal volume of reservoir solution containing the ligands, cryoprotection, X-ray diffraction structure determination and analysis at 1.8-1.95 A resolution, modeling of the transition state complex	
2.1.3.9	wild-type and mutant AOTCase complexed with bisubstrate analogue Ndelta-(phosphonoacetyl)-Nalpha-acetyl-L-ornithine, hanging drop vapor diffusion method, mixing of 0.002 ml 10 mg/ml protein in solution with 0.0016 ml of reservoir solution and 0.0004 ml 10 mM ligand solution. The reservoir solution contains 20% w/v PEG 3350, 0.2 M lithium sulfate, and 0.1 M Bis-Tris, pH 6.0, X-ray diffraction structure determination and analysis at 1.8-2.2 A resolution, molecular replacement