Skip to main content
. Author manuscript; available in PMC: 2019 Jan 28.
Published in final edited form as: RSC Adv. 2017 Oct 12;7(76):48068–48076. doi: 10.1039/C7RA08870A

Table 2.

Identified phosphopeptides from tryptic digestion of β-casein

Peptide name [M + H]+ m/z (theoretical)a [M + H]+ m/z (experimental) Amino acid sequenceb Position
β1 2061.83 2062 FQ[pS]EEQQQTEDELQDK 48–63
β2 2556.09 2557 FQ[pS]EEQQQTEDELQDKIHPF 48–67
β3 3122.26 3122 RELEELNVPGEIVE[pS]L[pS][pS][pS]EESITR 16–40
a

Theoretical masses determined with the PeptideMass tool in ExPASy (Expert Protein Analysis System, http://www.uniprot.org) using UniProtKB data for β-casein (entry ID: P02666).

b

[pS] represents a phosphorylated serine residue, and is included in the theoretical mass calculation.