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Post‐translational modifications of α‐AI1, α‐AI2, α‐AI4, and α‐AI5. Proteolytic activation includes the removal of signal peptide, and the proteolytic scission of subunits α and β. Then, dimerization leads to αβ dimers that associate in pairs to form the heterotetramer α2β2, the active α‐AI molecule (adapted from Lee et al., 2002). α‐AI, α‐amylase inhibitor
