A protease comprising an amino acid sequence that has at least 92.5% sequence identity to the amino acid sequence set forth in SEQ ID NO:2 over the entire length thereof, and that has an amino acid substitution at one or more of positions P9, Q10, Q62, L82, P86, N130, T141, N187, S236, and T253, based on the numbering according to SEQ ID NO:2, wherein the amino acid sequence that has the at least 92.5% sequence identity to the amino acid sequence set forth in SEQ ID NO:2 has protease activity, and wherein the at least one amino acid substitution is selected from the group of P9H, Q10E, Q62E, L82F, P86S, P86A, N130D, T141K, N187H, S236A, T253S, and combinations thereof, based on the numbering according to SEQ ID NO:2.