The Company of Biologists

Table 2.

Muscle enzyme activities from Ochotona princeps residing at 3350 m, Ochotona collaris residing at 1070 m, Ochotona hyperborea residing at sea level and laboratory rabbits (Oryctolagus cuniculus)

	Heart	Diaphragm	Vastus	Gastrocnemius	Soleus
Citrate synthase
O. princeps	303.71±9.17^a	160.16±7.23^a	50.00±2.69^a	52.16±4.60^a	60.68±6.19^a
O. collaris	261.69±13.30^b	123.42±1.98^b	46.84±3.40^a	46.71±2.28^a	55.91±2.10^a
O. hyperborea	173.36±16.62^c	-	-	-	-
Rabbit	131.27±3.86^c	53.48±2.88^c	22.33±1.86^b	23.85±3.49^b	42.07±2.56^b
β-hydroxyacyl CoA dehydrogenase
O. princeps	199.98±11.99^a	97.49±3.99^a	22.58±1.04^a	27.97±1.23^a	42.42±2.80^a
O. collaris	149.09±8.02^b	70.78±3.22^b	31.11±1.12^b	31.35±2.46^a	36.46±2.02^a
O. hyperborea	125.71±16.61^a,b	-	-	-	-
Rabbit	216.94±9.91^a	62.95±3.46^b	24.06±1.93^a,b	29.86±3.58^a	53.10±3.36^b
Lactate dehydrogenase
O. princeps	401.26±9.66^a	592.42±15.57^a	1011.43±6.11^a	1216.04±64.50^a	1145.15±85.77^a
O. collaris	172.40±6.35^b	289.15±13.63^b	590.01±13.29^b	586.22±20.63^b	505.68±21.76^b
O. hyperborea	116.29±19.35^b	-	-	-	-
Rabbit	151.05±8.05^b	523.63±6.81^c	1123.94±31.16^c	963.08±14.17^c	177.51±9.21^c

	Heart	Diaphragm	Vastus	Gastrocnemius	Soleus
Citrate synthase
O. princeps	303.71±9.17^a	160.16±7.23^a	50.00±2.69^a	52.16±4.60^a	60.68±6.19^a
O. collaris	261.69±13.30^b	123.42±1.98^b	46.84±3.40^a	46.71±2.28^a	55.91±2.10^a
O. hyperborea	173.36±16.62^c	-	-	-	-
Rabbit	131.27±3.86^c	53.48±2.88^c	22.33±1.86^b	23.85±3.49^b	42.07±2.56^b
β-hydroxyacyl CoA dehydrogenase
O. princeps	199.98±11.99^a	97.49±3.99^a	22.58±1.04^a	27.97±1.23^a	42.42±2.80^a
O. collaris	149.09±8.02^b	70.78±3.22^b	31.11±1.12^b	31.35±2.46^a	36.46±2.02^a
O. hyperborea	125.71±16.61^a,b	-	-	-	-
Rabbit	216.94±9.91^a	62.95±3.46^b	24.06±1.93^a,b	29.86±3.58^a	53.10±3.36^b
Lactate dehydrogenase
O. princeps	401.26±9.66^a	592.42±15.57^a	1011.43±6.11^a	1216.04±64.50^a	1145.15±85.77^a
O. collaris	172.40±6.35^b	289.15±13.63^b	590.01±13.29^b	586.22±20.63^b	505.68±21.76^b
O. hyperborea	116.29±19.35^b	-	-	-	-
Rabbit	151.05±8.05^b	523.63±6.81^c	1123.94±31.16^c	963.08±14.17^c	177.51±9.21^c

Values are means ± S.E.M., measured in μmol substrate converted g^-1 wet tissue min^-1. Statistical analyses were performed to compare activities of each enzyme between species within each tissue. Values within each column which do not have the same superscript letter differ significantly (P<0.05) as determined by analysis of variance and Scheffe's multiple range test. N is 8 for O. princeps and rabbit, 9 for O. collaris and 4 for O. hyperborea.

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