Table 1.

Identification of the autoantigens included in CD41⁺ MPs from RA SF

Protein ID	Number of peptidesa
Apolipoprotein A-1	7; 8; 4; 5
Clusterin	0; 2; 0; 0
Fibrinogen alpha chain	6; 16; 14; 11
Fibrinogen beta chain	0; 13; 15; 6
Histone H2A	2; 3; 3; 3
Histone H2B	2; 4; 2; 4
Vimentin	0; 1; 0; 2

^aThe number of peptides detected for each protein is indicated for each RA patient.