Table 2.
Amino acid composition, in mole percent, of purified Bc-CPs and egg capsule, showing large differences in Cys and Lys content compared to α-keratin39. The maximum standard deviation is ~5% of the values shown.
| Amino Acid |
CP-1 | CP-2 | CP-3 | Bulk Egg Capsule |
α-Keratin |
|---|---|---|---|---|---|
| Ala | 9.0 | 6.4 | 6.3 | 7.5 | 7.7 |
| Arg | 4.7 | 4.2 | 4.1 | 3.9 | 7.9 |
| Asx | 10.1 | 10.8 | 10.7 | 13.5 | 9.6 |
| Cys | 0.0 | 0.0 | 0.0 | 0.0 | 6.0 |
| Glx | 18.6 | 16.1 | 16.7 | 15.6 | 16.9 |
| Gly | 5.1 | 5.9 | 6.3 | 8.0 | 5.2 |
| His | 2.2 | 3.4 | 3.7 | 1.5 | 0.6 |
| lie | 5.9 | 5.4 | 6.1 | 4.9 | 3.8 |
| Leu | 9.5 | 9.1 | 8.6 | 9.5 | 10.2 |
| Lys | 12.0 | 12.2 | 12.6 | 9.4 | 4.1 |
| Met | 0.0 | 0.0 | 0.0 | 0.8 | 0.6 |
| Phe | 2.4 | 4.1 | 5.6 | 4.6 | 2.0 |
| Pro | 0.9 | 2.9 | 1.6 | 1.9 | 3.3 |
| Ser | 7.2 | 7.9 | 7.5 | 8.0 | 8.1 |
| Thr | 5.0 | 4.7 | 3.5 | 5.0 | 4.8 |
| Tyr | 0.3 | 0.5 | 0.0 | 0.4 | 2.7 |
| Val | 7.1 | 6.4 | 6.7 | 5.5 | 6.4 |
| Total | 100 | 100 | 100 | 100 | 100 |