Sequencea Mascot Ion Score Start Position Stop Position Modifications
(K)TASNLTVSVLEAEGVFEK(G) 52.12 65 82  
(K)TASNLTVSVLEAEGVFEK(G) 25.9 65 82  
(R)TQDEILFSNSTR(L) 28.94 110 121 Deamidated (+1)
(R)NYTEYWSGSNSGNQK(M) 67.41 397 411 Deamidated (+1)
(K)INYTVPQSGTFK(I) 28.25 418 429  
(K)QNSTMFSLTPENSWTPK(A) 70.75 512 528 Deamidated (+1) Oxidation (+16)
aDeamidated asparagine and oxidized methionine residues in bold, N-glycosylation motif underlined, amino acids in parentheses indicate residues preceding and following trypsin cleavage
Table 2: CD109 peptides identified by MS/MS.