Keywords: Ab, antibody; AChR, acetylcholine receptor; BSA, bovine serum albumin; a-Btx, α-bungarotoxin; CNBr, cyanogen bromide; ECD, extracellular domain; i.v, intravenous; IVIg, intravenous immunoglobulin; IPT, in vitro pyrogen test; LAL, limulus amoebocyte lysate