Lonijaposides O–W have structural features that involve amino acid units sharing the N atom with a pyridinium (1 – 5) or nicotinic acid (6 – 9) moiety. The absolute configurations of the amino acid ...

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Nicotinic receptors — a family of ligand-gated ion channels that mediate the effects of the neurotransmitter acetylcholine — are among the most well understood allosteric membrane proteins ...