Table I

Reference peptides used in this study

Letters in bold refer to isotopically labeled amino acids. M*, Met oxide; C#, carbamidomethyl-Cys.

ProteinAccession no.Peptide sequence
1Sex hormone-binding globulin precursor IPI00023019 LDVDQALDR
2Complement C2 precursor IPI00303963 TM*FPDLTDVR
3Megakaryocyte-stimulating factor IPI00024825 DGTLVAFR
4Low density lipoprotein receptor-related protein 1 precursor IPI00020557 FDSTEYQVVTR
5TMEM27 IPI00010191 EATEISHVLLC#DVTQR