4xbd
1.45a resolution structure of norovirus 3cl protease complex with a covalently bound dipeptidyl inhibitor (1r,2s)-2-({n-[(benzyloxy)carbonyl]-3-cyclohexyl-l-alanyl}amino)-1-hydroxy-3-[(3s)-2-oxopyrrolidin-3-yl]propane-1-sulfonic acid (orthorhombic p form)
