Wikipedia
Polyporopepsin
Polyporopepsin (, Polyporus aspartic proteinase, Irpex lacteus aspartic proteinase, Irpex lacteus carboxyl proteinase B) is an enzyme. This enzyme catalyses the following chemical reaction
Milk clotting activity, broad specificity, but fails to cleave Leu-Tyr or Tyr-Leu of insulin B chainThis enzyme is isolated from the basidiomycete Polyporus tulipiferae.