Aim This paper focuses on the Native-PAGE analysis of LDH isoenzyme in gill

muscle

heart and heapatopancrea of Eriocheir sinensis and Sinopotamon Yangtsekiense Bott to provide biochemical indexes to analyze the population genetic structures and breed planned species of system of the two species. Methods The method of Native-PAGE electrophore and the scanning system of GDS-9000 are adopted. Results and Conclusions LDH in Eriocheir sinensis presents six isoenzyme bands while the two isoenzy-me bands near to the positive and weaker than that of sinopotamon Yangtsekiense Bott. The favorable isoenzyme in the corresponding tissues of the two species has both similarities and differences between them.