Table 1. Refractive Index Increment by Amino Acid Type.
| amino acid type | dn/dc from ref 11 (mL/g) | frequency, average (%) | frequency, hγS human (%) | frequency, TγS1 toothfish (%) | frequency, TγS2 toothfish (%) | frequency, DγB zebrafish (%) | frequency, DγS3 zebrafish (%) | frequency, chγS1 shark (%) | frequency, chγS2 shark (%) | frequency, cLγS1 catfish (%) | frequency, cLγS2 catfish (%) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Ala (A) | 0.167 | 7.4 | 3.9 | 1.1 | 4.0 | 2.2 | 2.1 | 0.6 | 1.2 | 1.7 | 1.7 |
| Arg (R) | 0.206 | 4.3 | 7.3 | 9.1 | 4.6 | 12.1 | 12.3 | 12.8 | 12.8 | 12.1 | 12.2 |
| Asn (N) | 0.192 | 4.4 | 2.8 | 4.5 | 5.7 | 5.5 | 4.8 | 2.9 | 3.5 | 5.8 | 4.7 |
| Asp (D) | 0.197 | 5.9 | 5.6 | 5.1 | 5.2 | 6.0 | 5.3 | 7.0 | 6.4 | 6.9 | 5.8 |
| Cys (C) | 0.206 | 3.3 | 3.9 | 5.1 | 5.2 | 3.3 | 3.2 | 4.1 | 3.5 | 5.2 | 5.8 |
| Gln (Q) | 0.186 | 3.7 | 5.1 | 4.5 | 5.2 | 4.4 | 4.3 | 3.5 | 2.9 | 1.2 | 1.7 |
| Glu (E) | 0.183 | 5.8 | 7.9 | 8.5 | 8.0 | 7.1 | 8.0 | 5.8 | 5.8 | 4.6 | 4.7 |
| Gly (G) | 0.175 | 7.4 | 8.4 | 6.8 | 7.5 | 6.6 | 5.9 | 8.1 | 7.6 | 8.1 | 9.9 |
| His (H) | 0.219 | 2.9 | 2.2 | 2.3 | 2.3 | 2.7 | 2.7 | 2.3 | 2.9 | 3.5 | 2.9 |
| Ile (I) | 0.179 | 3.8 | 5.6 | 3.4 | 3.4 | 4.4 | 5.3 | 4.7 | 4.7 | 1.2 | 4.7 |
| Leu (L) | 0.173 | 7.6 | 5.1 | 1.7 | 2.9 | 5.5 | 5.9 | 3.5 | 2.3 | 0.6 | 1.7 |
| Lys (K) | 0.181 | 7.2 | 5.6 | 2.3 | 5.2 | 2.2 | 1.1 | 1.2 | 1.2 | 1.7 | 1.7 |
| Met (M) | 0.204 | 1.8 | 2.8 | 4.5 | 2.3 | 3.8 | 2.7 | 5.8 | 5.2 | 12.7 | 9.3 |
| Phe (F) | 0.244 | 4.0 | 5.1 | 6.8 | 6.9 | 6.6 | 7.0 | 4.7 | 5.8 | 5.8 | 5.8 |
| Pro (P) | 0.165 | 5.0 | 4.5 | 4.5 | 2.9 | 3.8 | 4.8 | 4.1 | 5.2 | 1.7 | 2.9 |
| Ser (S) | 0.170 | 8.1 | 6.2 | 8.5 | 8.6 | 6.6 | 7.5 | 8.1 | 8.1 | 8.7 | 9.3 |
| Thr (T) | 0.172 | 6.2 | 3.9 | 6.8 | 3.4 | 3.8 | 4.3 | 2.3 | 2.3 | 1.7 | 1.2 |
| Trp (W) | 0.277 | 1.3 | 2.2 | 2.3 | 2.9 | 2.7 | 2.7 | 2.9 | 2.9 | 3.5 | 3.5 |
| Tyr (Y) | 0.240 | 3.3 | 7.9 | 9.1 | 7.5 | 6.6 | 6.4 | 11.6 | 11.0 | 9.2 | 8.1 |
| Val (V) | 0.172 | 6.8 | 3.9 | 2.8 | 6.3 | 3.8 | 3.7 | 4.1 | 4.7 | 4.0 | 2.3 |