sentences:  showed that MLA bound to nAChRs extracted from human muscle with a Ki of ~8 x 10−6M; it was also reported that MLA, at a concentration of 10−4M, had no affinity for [[muscarinic]] AChRs, as labeled by [[tritiated]] [[quinuclidinyl benzilate]], from rat brain.Further details about the binding of MLA to nAChRs were presented by Wonnacott and her co-workers, who provided evidence that MLA bound preferentially to different sub-units, as expressed in "Xenopus" frog [[oocytes]], of the nAChR cloned from avian DNA