Related Experiment Video
Updated: Oct 2, 2026

Localization of Plasma Membrane and Intracellular Neuronal Nicotinic Acetylcholine Receptors Using Quantitative Imaging in Mammalian Cells
Published on: December 19, 2025
Genetic and functional analysis of single nucleotide polymorphisms in the beta2-neuronal nicotinic acetylcholine
Kira K Lueders1, Stella Hu, Louise McHugh
1Laboratory of Biochemistry, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892-4255, USA.
Abstract:
The beta2-neuronal nicotinic acetylcholine receptor gene (CHRNB2) is a logical candidate for influencing smoking behavior and nicotine dependence. We discovered six single nucleotide polymorphisms (SNPs) in the CHRNB2 gene by surveying 15.4 kb of genomic sequence including a previously undescribed 3' untranslated region that extends 4.0 kb downstream of the coding region. One of the SNPs causes an amino acid substitution in exon 5, one occurs in the promoter region, one changes an intronic base, and three occur in the 3' untranslated region. The ethnically dependent allele frequencies and the marker-to-marker linkage disequilibrium patterns of five of these polymorphisms were determined. The SNPs were assayed in 743 individuals for whom information on smoking history and lifelong nicotine dependence was available. No significant associations of the individual markers or their haplotypes to smoking behavior or level of nicotine dependence were found.
More Related Videos
Related Concept Videos
Cholinergic Receptors: Nicotinic
There are two types of nicotinic receptors: neuromuscular (NM/NM/N1) and neuronal (NN/NN/N2). The two families differ based on their location and selectivity to...
Adrenergic Receptors: β Subtype
Isoprenaline > Adrenaline > Noradrenaline
Neurotransmitter binding to these receptors causes activation of adenylyl cyclase resulting in increased concentrations of cAMP and modulation of calcium ion channels within the cell. They are further classified into β1, β2, and β3 subtypes.
β1-adrenoceptors: β1-adrenoceptors have equal affinities for...
Pharmacogenetic Phenotypes: Alterations in Pharmacokinetics, Drug Targets and Biologic Milieu

