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. 2019 May;189:1–9. doi: 10.1016/j.jsbmb.2019.01.014

Fig. 3.

Fig. 3

α-1-Antitrypsin and C3a directly interact.

(a) C3a content in commercial human plasma-derived and recombinant α-1-antitrypsin was assessed by CBA anaphylatoxin flex set. (b–c) Direct physical interaction of α-1-antitrypsin with C3a was identified using (b) surface plasmon resonance (SPR) and (ii) microscale thermophoresis (MST) methodology. Curve fit analyses indicated Kd values of 8.4 μM (b) and 7.5 μM (c).