streptokinase: an enzyme produced by some strains of streptococcus that can liquefy blood clots by converting plasminogen to plasmin; used medicinally in some cases of myocardial infarction and pulmonary embolism
enzyme: any of several complex proteins that are produced by cells and act as catalysts in specific biochemical reactions
print: a copy of a movie on film (especially a particular version of it)