|  | Amino acid | |||||
---|---|---|---|---|---|---|---|
 |  | Asx | Ser | Leu | Ile | Glx | Ala |
Tooth dentin | Mean D/D+L ratio | 0.0599 | 0.0198 | 0.0105 | 0.0077 | 0.0137 | 0.0135 |
 | r 2 | 0.961 | 0.827 | 0.349 | 0.018 | 0.014 | 0.002 |
 | Slope e-105 | 65.2 | 30.5 | 6.9 | -3.4 | 0.5 | 0.6 |
 | P value | <0.0001a | <0.0001a | 0.0019a | 0.5246 | 0.5740 | 0.8497 |
Normal articular cartilage | Mean D/D+L ratio | 0.0463 | 0.0142 | 0.0117 | 0.0125 | 0.0125 | 0.0283 |
 | r 2 | 0.778 | 0.470 | 0.287 | 0.060 | 0.194 | 0.001 |
 | Slope e-105 | 35.2 | 18.4 | 11.6 | 0.7 | 2.3 | -0.6 |
 | P value | <0.0001a | 0.0012a | 0.0181a | 0.3136 | 0.0590 | 0.9410 |
OA articular cartilage | Mean D/D+L ratio | 0.0506 | 0.0120 | 0.0105 | Â | Â | Â |
 | r 2 | 0.126 | 0.173 | 0.053 |  |  |  |
 | Slope e-105 | 16.0 | 7.0 | 6.0 |  |  |  |
 | P value | 0.081 | 0.055 | 0.221 |  |  |  |
OA meniscal cartilage | Mean D/D+L ratio | 0.0506 | 0.0127 | 0.0099 | Â | Â | Â |
 | r 2 | 0.021 | 0.002 | 0.0099 |  |  |  |
 | Slope e-105 | 8.0 | 1.0 | -3.0 |  |  |  |
 | P value | 0.442 | 0.802 | 0.595 |  |  |  |