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Antibodies raised in guinea pig can be used with antibodies raised in mouse, rabbit, goat, etc. in complex immunostaining or immunoprecipitation protocols.

nAChRs are pentameric complexes made up of combinations of a number of different nAChR subunits, which can be classified as α subunits, containing two cysteine residues at positions analogous to Cys192 and Cys193, and non-alpha subunits (‘structural’ subunits), which can be defined as β subunits when they are expressed in the vertebrate nervous system. There are nine α subunits (α2–α10) and three β subunits (β2, β3, and β4) in the CNS. Nicotinic receptors are assembled as combinations of α (2-6) and and β (2-4) subunits.