Giant Amazonian fish pirarucu (Arapaima gigas): Its viscera as a source of thermostable trypsin

► A trypsin from the viscera of an economically important Brazilian fish. ► Evaluate the use of fish processing waste as a source of alkaline proteases. ► Potential applications of this enzyme on food and detergent industrial segments. ► Characterisation and sequencing of the NH2-terminal region of this trypsin. ► The effect of metal ion on this trypsin activity.