Indigenous proteases in the skin of unicorn leatherjacket (Alutherus monoceros) and their influence on characteristic and functional properties of gelatin

► Indigenous proteases hydrolysed gelatin from skin of unicorn leatherjacket during extraction. ► Soybean trypsin inhibitor (SBTI) could prevent the degradation of gelatin during extraction. ► Gelatin extracted in the presence of SBTI had the improved functional properties.