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EMBO J 1989 Jun 01;86:1665-70. doi: 10.1002/j.1460-2075.1989.tb03557.x.
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GABAA receptor beta subunit heterogeneity: functional expression of cloned cDNAs.

Ymer S , Schofield PR , Draguhn A , Werner P , Köhler M , Seeburg PH .

Cloned cDNAs encoding two new beta subunits of the rat and bovine GABAA receptor have been isolated using a degenerate oligonucleotide probe based on a highly conserved peptide sequence in the second transmembrane domain of GABAA receptor subunits. The beta 2 and beta 3 subunits share approximately 72% sequence identity with the previously characterized beta 1 polypeptide. Northern analysis showed that both beta 2 and beta 3 mRNAs are more abundant in the brain than beta 1 mRNA. All three beta subunit encoding cDNAs were also identified in a library constructed from adrenal medulla RNA. Each beta subunit, when co-expressed in Xenopus oocytes with an alpha subunit, forms functional GABAA receptors. These results, together with the known alpha subunit heterogeneity, suggest that a variety of related but functionally distinct GABAA receptor subtypes are generated by different subunit combinations.

PubMed ID: 2548852
PMC ID: PMC401007
Article link: EMBO J

Species referenced: Xenopus
Genes referenced: gabarap

References [+] :
Ballivet, Electrophysiology of a chick neuronal nicotinic acetylcholine receptor expressed in Xenopus oocytes after cDNA injection. 1990, Pubmed, Xenbase