FIG. 1.
Red blood cell (RBC) acetylcholinesterase (AChE) activity as a function of rat erythrocyte age. AChE activity is expressed in i.u. (1 i.u.=μmol of acetylthiocholine iodide hydrolyzed/min) per gram of hemoglobin at 37°C. Values are taken mean±standard error of the mean (SEM). Values are mean±SEM. Intra-group variation for 4-month-old rate: U-2, 1-2 (significant at p<0.05), U-1 (not significant). For 24-month-old rats: U-2, 1-2 (significant at p<0.05), U-1 (not significant). Inter-group comparisons measured using a Bonferroni post hoc test (significant at p<0.05).