Fig. 5. Concentration of lactate (mmol kg^-1 wet mass) in frog femurs incubated in 30 mmol l^-1 lactate for 6 and 24 h at pH 8.0 or 7.3. Values are means ± S.E.M., N =6 per treatment at each time point. There was no significant time x pH interaction but there were separate pH and time effects (LSM, Student's post-hoc t-test).