Fig. 4. Activities (mean ± s.e.m.) of lactate dehydrogenase (LDH) (units
g-1 wet tissue) in liver (A), tail muscle (B) and heart (C). Open
boxes indicate cold-acclimation treatment and solid boxes indicate
warm-acclimation treatment. LDH activity is significantly greater at low
temperatures in cold-acclimated animals in muscle and heart, but not in
liver.