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Comparison of Hcy- and S-Hcy-keratin levels and solubility in mammal and bird pelage.
| Animals (number of species, n) | Hcy-keratin (pmol/mg hair) | S-Hcy-keratin (pmol/mg hair) | Hcy-keratin/(Hcy-keratin + S-Hcy-keratin) | SDS-insoluble Hcy-keratin fraction |
|---|---|---|---|---|
| Mammals (12) | 277 ± 202 | 247 ± 146 | 0.47 ± 0.15 | 0.75 ± 0.12 |
| Birds (5) | 556 ± 552 | 112 ± 54 | 0.79 ± 0.10 | 0.87 ± 0.07 |
| t-test | 0.518 | 0.037 | 0.0003 | 0.019 |
