The point mutation (arginine replaces methionine in peptide 1) is underlined.
| Number of peptides | Fractional M1775 (wild type) sequence peptides | Composition (%) (error, 8%) | Fractional M1775R (mutated) sequence peptides | Composition (%) (error, 8%) |
| 1 | ICCYGPFTNMPTDQLE | 11.18 | ICCYGPFTNRPTDQLE | 6.36 |
| 2 | APVVTREWVLD | 7.85 | SDPSEDRAPE | 9.92 |
| 3 | ADALYTNPAQARE | 2.56 | TSYLPRQDLE | 5.91 |
| 4 | TAANLHAPVILAGTPGTFT HAGTE | 14.25 | SARVGNIPSSTSALKVPQLK VAE | 10.25 |
| 5 | NLVQRVPKDVFMGVDE | 7.30 | ASHLPFAQNISRVKE | 7.72 |
| 6 | GAILVVAATDGPMPQTRE | 11.76 | VYILSKDE | 8.76 |
| 7 | GGDALIPMLKE | 9.26 | TFNVGSFASGKE | 5.76 |
| 8 | KFMKIISLAPE | 11.34 | RYLGAKFPGAKRFSLE | 7.75 |
| 9 | VIAHLVNWE | 10.22 | AAKAKGAMALFGEKYDE | 6.98 |
| 10 | RINKALDFIAE | 8.25 | GRQGGTLQLFRTE | 4.22 |
| 11 | LRAKNQITLPVILKNE | 5.03 | KFTALTAELTAE | 7.44 |
| 12 | GGRTVGAGVVAKVLS | 6.38 | ||
| 13 | RFQADTLARFE | 6.15 | ||
| 14 | FLKAGGVFTDE | 6.57 |