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Fig. 2. Differences in metabolic enzyme and isozyme activities between pika species
residing at high altitude (Ochotona princeps from 3350 m) and low
altitude (Ochotona collaris from 1070 m). Activities are shown for
three tissues: heart (H), diaphragm (D) and vastus lateralis (V). Values are
means ± S.E.M. Error bars for total LDH activities are smaller than the
symbols used. N=8 for O. princeps total LDH values,
N=9 for O. collaris total LDH values. N=3 for all
isozyme analyses. CS, citrate synthase; LDH, lactate dehydrogenase; H-LDH,
heart-type lactate dehydrogenase.