sentences:  Subsequently, research groups from [[Abbott Laboratories]] in the USA, and the University of Geneva in Switzerland reported that MLA displaced 125I-α-bungarotoxin from α7 receptors cloned from the human K28 cell line, with a Ki of ~ 1 x 10−8.One last milestone in the ongoing saga of MLA pharmacology (there are, as of April 2012, approximately 660 references to articles in journals covered by PubMed) to be mentioned is the characterization of the receptor-interactions of [[tritium-labeled]] MLA, by researchers at the University of Bath, in the UK.One relatively recent study which sheds light on the interaction of MLA with acetylcholine-binding proteins (AChBP) at the molecular level is that of Hansen et al., who made observations on the crystal structure of a complex between MLA and an AChBP isolated from the salt-water snail, "[[Aplysia californica]]".