The figure shows the performance of the CD-1 mice in discriminating between various dilutions of L-cysteine and the odorless solvent. Three animals, M3, M4 and M6, significantly distinguished dilutions as low as 0.003 mM from the solvent. The other two animals, M2 and M5, significantly distinguished dilutions as low as 0.01 mM from the solvent.

The figure shows the performance of the CD-1 mice in discriminating between various dilutions of L-methionine and the odorless solvent. One animal, M6, significantly distinguished dilutions as low as 0.03 mM from the solvent. M4 significantly distinguished dilutions as low as 0.1 mM. M2 and M3 both managed to significantly distinguish dilutions as low as 1.0 mM from the solvent. M5 significantly distinguished dilutions as low as 3.3 mM from the solvent.

The figure shows the performance of the CD-1 mice in discriminating between various dilutions of L-proline and the odorless solvent. All five test animals significantly distinguished dilutions of 10 mM from the solvent.

The figure shows the performance of the CD-1 mice in discriminating between various dilutions of D-cysteine and the odorless solvent. Two animals, M2 and M3, significantly distinguished dilutions as low as 0.001 mM from the solvent. Both M5 and M6 managed to distinguish dilutions as low as 0.003 mM from the solvent. M4 significantly distinguished dilutions as low as 0.03 mM from the solvent.

The figure shows the performance of the CD-1 mice in discriminating between various dilutions of D-methionine and the odorless solvent. Two animals, M4 and M6, significantly distinguished dilutions as low as 0.01 mM from the solvent. M3 significantly distinguished dilutions as low as 0.1 mM from the solvent. Both M2 and M5 managed to significantly distinguish dilutions as low as 0.3 mM from the solvent.

The figure shows the performance of the CD-1 mice in discriminating between various dilutions of D-proline and the odorless solvent. One animal, M5, significantly distinguished dilutions of 3.3 mM from the solvent. The other four animals, M2, M3, M4 and M6, significantly distinguished dilutions as low as 10 mM from the solvent.