Fig. 2From: Rapid screening and identification of bioactive compounds specifically binding to beta 2-adrenoceptor from San-ao decoction using affinity magnetic fine particles coupled with high-performance liquid chromatography–mass spectrometryThe scheme for the immobilization of β2-AR on the surface of Fe3O4 FPs. The structure of the compound was created using Chemdraw software. The blue ellipsoid represented β2-ARBack to article page