| Amido acid | B-PSC | C-PSC | U-PSC |
| Asparagine | 47 | 45 | 47 |
| Threonine | 26 | 23 | 27 |
| Serine | 35 | 25 | 36 |
| Glutamine | 72 | 69 | 72 |
| Proline | 127 | 112 | 109 |
| Glycine | 321 | 342 | 325 |
| Alanine | 124 | 135 | 141 |
| Cystine | 0 | 0 | 0 |
| Valine | 24 | 25 | 21 |
| Methionine | 12 | 14 | 12 |
| Isoleucine | 11 | 12 | 7 |
| Leucine | 20 | 21 | 16 |
| Tyrosine | 2 | 2 | 2 |
| Phenylalanine | 18 | 14 | 12 |
| Lysine | 31 | 26 | 27 |
| Histidine | 5 | 5 | 6 |
| Arginine | 57 | 51 | 53 |
| hydroxyproline | 68 | 79 | 83 |
| total | 1000 | 1000 | 996 |