3.4.21.7 crystal structure of plasmin complexed with streptokinase 3.4.21.7 in complex with trans-4-aminomethylcyclohexanecarbonyl-L-tyrosine-n-octylamide, using 10% (w/v) polyethylene glycol 6000, 4% (v/v) 2-methyl-2,4-pentanediol, and 0.1 M MES (pH 5.0) at 20°C