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. Author manuscript; available in PMC: 2008 Oct 20.
Published in final edited form as: J Proteome Res. 2005;4(2):424–434. doi: 10.1021/pr049804u

Table 1.

Amino Acid Sequences of Synthetic α-S1 Casein Phosphopeptides 106–119 and Substitutions Made

peptide name peptide sequence substitutiona
α-S1 casein 106–119 VPQLEIVPNpSAEER none
α-S1 casein 106–119 I. S.b VPQLEIVPNpSAEER 15N,13C5–Val112
α-S1 casein 106–119 Ala114 VPQLEIVPApSAEER Asn114 → Ala
α-S1 casein 106–119 pThr115 VPQLEIVPNpTAEER pSer115 → pThr
α-S1 casein 106–119 Lys115 VPQLEIVPNKAEER pSer115 → Lys
α-S1 casein 106–119 pTyr115 VPQLEIVPNpYAEER pSer115 → pTyr
a

Abbreviations are as follows: pSer, phosphoserine; pThr, phosphothreonine; pTyr, phosphotyrosine

b

I. S., internal standard.