PMID- 7884042 OWN - NLM STAT- MEDLINE DCOM- 19950411 LR - 20071114 IS - 0021-9967 (Print) IS - 0021-9967 (Linking) VI - 350 IP - 2 DP - 1994 Dec 8 TI - Immunocytochemical localization of the beta 2 subunit of the gamma-aminobutyric acidA receptor in the rat brain. PG - 260-71 AB - An antiserum to the beta 2 subunit of the rat gamma-aminobutyric acid (GABAA) receptor was prepared by immunizing a rabbit with a fusion protein expressed in bacteria. The fusion protein had the large, intracellular loop expanding between the putative M3 and M4 transmembrane domains of the beta 2 subunit fused to staphylococcal protein A (SPA). The antiserum immunoprecipitated both the solubilized and the affinity-purified GABAA receptors. The anti-beta 2 antibodies were affinity purified on immobilized beta 2 intracellular loop peptide. The antibodies recognized a 55-57 kDa peptide in immunoblots of either crude membranes from rat cerebral cortex or affinity-purified GABAA receptors from bovine cerebral cortex. Immunocytochemistry with the affinity-purified antibody has revealed for the first time the localization of the beta 2 subunit in the rat brain. A comparative study of the regional and cellular immunoreactivities of the affinity-purified anti-beta 2 antibody and the monoclonal antibody 62-3G1 (which recognizes both beta 2 and beta 3 subunits) is presented. The procedure described for generating and preparing specific anti-beta 2 subunit antibodies that are valuable for immunocytochemistry could be extended to other GABAA receptor subunits. FAU - Moreno, J I AU - Moreno JI AD - Division of Molecular Biology and Biochemistry, School of Biological Sciences, University of Missouri-Kansas City 64110-2499. FAU - Piva, M A AU - Piva MA FAU - Miralles, C P AU - Miralles CP FAU - De Blas, A L AU - De Blas AL LA - eng GR - NS17708/NS/NINDS NIH HHS/United States PT - Journal Article PT - Research Support, U.S. Gov't, P.H.S. PL - United States TA - J Comp Neurol JT - The Journal of comparative neurology JID - 0406041 RN - 0 (Peptide Fragments) RN - 0 (Receptors, GABA-A) RN - 0 (Recombinant Fusion Proteins) RN - 0 (Staphylococcal Protein A) SB - IM MH - Amino Acid Sequence MH - Animals MH - Antibody Specificity MH - Base Sequence MH - Brain Chemistry/*physiology MH - Immunoblotting MH - Immunohistochemistry MH - Molecular Sequence Data MH - Peptide Fragments/*analysis MH - Precipitin Tests MH - Rats MH - Receptors, GABA-A/*analysis MH - Recombinant Fusion Proteins/isolation & purification MH - Staphylococcal Protein A EDAT- 1994/12/08 00:00 MHDA- 1994/12/08 00:01 CRDT- 1994/12/08 00:00 PHST- 1994/12/08 00:00 [pubmed] PHST- 1994/12/08 00:01 [medline] PHST- 1994/12/08 00:00 [entrez] AID - 10.1002/cne.903500209 [doi] PST - ppublish SO - J Comp Neurol. 1994 Dec 8;350(2):260-71. doi: 10.1002/cne.903500209.