. 2020 Oct 12;58(3):1199–1208. doi: 10.1007/s13197-020-04836-1

Table 6.

Amino acid sequence of the salty peptide and its ion fragmentation

No	Component	Sequence	Precursor ion (m/z)	Fragment ion information
1	F-1	Asp-Asp	247.0848	130.5711 → [Aspc1 + –H] ⁺ 112.9923161.0568 → [M –Asp + Hx₁ + H]⁺ 187.0697 → [M–CO2OH-NH₃ + H]⁺
2	F-1	Glu-Asp	261.0985	10,332..09595706 → [Aspa₁ + + H]⁺ 144.5726 → [Gluc₁ + –H] ⁺ 201.0479 → [M-CO2OH-NH₃ + H]⁺
3	F-2	Asp-Asp-Asp	365.0484	116.0416 → [Asp-NH₃ + H] ⁺b₁ 133.9871 → [Aspy₁ + H]⁺ 205.0150 → [Asp + Aspz₂-H2ONH₃ –CO2 + H] 248.0168 → [Asp + Asp-H2O + Hy₂ + H]⁺ 319.0797 → [M-CO2 + HOH] ⁺
4	F-2	Ser-Pro-Glu	331.1558	86.0716 → [Serc₁-NH₃ + H] ⁺ 103.0955 → [Ser + H] ⁺c₁ 244.1972121.0555 → [a₂Glu + Pro- NH₃-H₂O + -H] ⁺ 216.1178 → [y₂-COSer + Pro + H]⁺
5	F-2	Phe-Ile	279.1102	86.0713121.0544 → [a₁Ile-CO2 + H]⁺ 148.9887 → [b₁Phe-NH3 + H]⁺ 163.0969 → [Phe + H] ⁺c₁ 216.1170 → [M-COO2H-NH₃ + H]⁺