Scytalidopepsin A

Scytalidopepsin A (EC 3.4.23.31, Scytalidium aspartic proteinase A, Scytalidium lignicolum aspartic proteinase, Scytalidium lignicolum aspartic proteinase A-2, Scytalidium lignicolum aspartic proteinase A-I, Scytalidium lignicolum aspartic proteinase C, Scytalidium lignicolum carboxyl proteinase, Scytalidium lignicolum acid proteinase) is an enzyme. This enzyme catalyses the following chemical reaction

Hydrolysis of proteins with specificity similar to that of pepsin A, but also cleaves Cys(SO₃H)⁷-Gly and Leu¹⁷-Val in the B chain of insulin

This enzyme is isolated from the fungus Scytalidium lignicolum.