Purity ~85% (SDS-PAGE). Low affinity receptor for acetylcholine known to be targeted by disease-causing pemphigus vulgaris antibodies in keratinocytes. Source: Recombinant protein corresponding to aa8-345 from human ANXA9, fused to His-SUMO-Tag at N-terminal, expressed in E. coli. Molecular Weight: ~53.7kD AA