Fig. 21

The intake of acid solution, offered as a choice with water in two-bottle preference tests, before and after miraculin (mir). Animals were presented with 50 ml of each acid and water. The acids were 0.02 M-ascorbic (asc), 0.02 M-citric (cit), 0.005 M-hydrochloric acid (HCl), 0.05 M-phosphate buffer (Na-p), 0.05 M- aspartic acid (asp) and water. Columns show intake before (hatched columns) and after (open columns) miraculin. The column labelled is the average water intake before and after miraculin. The average consumption of acids by each animal is shown on the right individual column. The average intake for each acid is shown at the bottom (error bars, 1 S.D.). The figure shows that miraculin increases intake of acids.