Multiple Assemblies exist for SMTL entry 4xbb
1.85A resolution structure of Norovirus 3CL protease complex with a covalently bound dipeptidyl inhibitor diethyl [(1R,2S)-2-[(N-{[(3-chlorobenzyl)oxy]carbonyl}-3-cyclohexyl-L-alanyl)amino]-1-hydroxy-3-(2-oxo-2H-pyrrol-3-yl)propyl]phosphonate; X-RAY DIFFRACTION 1.85 Å

	SMTL ID 4xbb.1 Ligands diethyl [(1R,2S)-2-[(N-{[(3-chlorobenzyl)oxy]carbonyl}-3-cyclohexyl-L-alanyl)amino]-1-hydroxy-3-(2-oxo-2H-pyrrol-3-yl)propyl]phosphonate; SULFATE ION Polypeptides 3C-LIKE PROTEASE Oligo-state monomer
	SMTL ID 4xbb.2 Ligands diethyl [(1R,2S)-2-[(N-{[(3-chlorobenzyl)oxy]carbonyl}-3-cyclohexyl-L-alanyl)amino]-1-hydroxy-3-(2-oxo-2H-pyrrol-3-yl)propyl]phosphonate; SULFATE ION Polypeptides 3C-LIKE PROTEASE Oligo-state homo-dimer