Abstract: The invention relates to a method for producing a recombinant functional plasminogen in micro-organisms, and to a method for identifying plasminogen activators. The nucleic acid sequence coding for the fuctional part of the plasminogen is fused with a nucleic acid molecule coding for at least one signal peptide. The nucleic acid molecule coding for the plasminogen and the nucleic acid molecule coding for the signal peptide are combined with codons for interfaces of proteases which ensure the separation of the signal peptide. The recombinant plasminogen or the corresponding plasmin is suitable for treating wounds which are slow to heal or not healing, by application of the enzyme in an appropriate formulation.