Purification and partial characterisation of a trypsin from the processing waste of the silver mojarra (Diapterus rhombeus)

► Purification of a trypsin isoform from an economically important fish. ► Application of fish waste as a source of proteases with biotechnological potential. ► Biochemical characterisation of a trypsin from an understudied fish. ► Sequencing of the NH2-terminal region of a trypsin from an understudied fish. ► Study of the effects of metal ion on the trypsin from an understudied fish.