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Lactate dehydrogenase isoenzymes of the the pika ochotona curzoniae and the plateau zokor myospalax baileyi


, : Lactate dehydrogenase isoenzymes of the the pika ochotona curzoniae and the plateau zokor myospalax baileyi. Acta Theriologica Sinica 5(3): 223-228

The lactate dehydrogenase (LDH) from heart, liver, kidney and skeletal muscle in the pika (Ochotona curzoniae) and the plateau zokor (Myospalax baileyi) was investigated in the present experiment. The isoenzyme patterns were analyzed by means of polyacrylamide gel electrophoresis, and the total enzyme activity was determined by the oxidaton of NADH at 340 nm in a spectrophotometer. The electrophoretic pattern of LDH in the crude extract of the tissues of the zokor was significantly different from the pattern of the pika. The electrophoretic mobility to the zokor LDH H4 was faster than the mobility to the pika LDH H4. The results revealed that the pika and the zokor were quite different. The former belongs to the order Lagomorpha, the latter belongs to the order Rodentia. The LDH M4 of the pika and the zokor was two analogical migrating zones towards the anode, and showed considerable homologies of primary structure. It may be related to adaptive evolution of hypoxia for a long time. The liver in the zokor contained only LDH M4, while the liver in the pika contained LDH H4, H3M, H2M2 and HM3. Perhaps the characters were caused by their food behaviour. The pika is a grass eating animal. It needs certain tension oxygen when digesting grass, but there isn't special need in digesting procedure of the zokor. The LDH activities of the zokor were rather low (compared to the) activities of the pika.

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