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Average response profiles (in 100-ms bins) of NaCl specialists (A–D) and acid generalists (E–H) to 0.1 M NaCl, 0.003–0.1 M acetic acid, and 0.003–0.1 M acetic acid mixed with 0.1 M NaCl. Vertical line indicates stimulus onset (time 0). *Significant differences in 0.1 M NaCl responses from acetic acid-NaCl mixtures during the first second.
