ACTG1 and temporal arteritis: Among these proteins, only one, the far upstream element-binding protein 2 (FUBP2) (Figure 2), was recognised in all five pools of sera from GCA patients, whereas three different proteins were identified in four pools of sera from GCA patients: actin cytoplasmic 1, actin cytoplasmic 2 and ANKRD26-like family C member 1A (Additional file 4, Supplemental Table S2).