Forums by sectionExplore all the forums on Forums home page »Popular university forumsPopular study forumsNews and lifestyle forumsGCSE home and forumsGuidesSubjects A-HSubjects I-ZAll GCSE learning tools »A-level home and forumsGuidesSubjects A-GSubject H-ZAll A-level learning tools »Revision homeStudy forumsRevision homeStudy forumsRevision discussionHelp with your subjectTools and resourcesHomepage and forumsGuides and toolsPersonal statementPopular nowUni home and forumsStudent lifeSubjects A-FSubjects G-ZAll uni learning tools »Careers home and forumsIndustry forumsMore industry forumsCareers adviceTalk relationshipsTalk health & lifestyleAdviceUndergraduateEU StudentsPostgraduateFurther informationNews forumsFind more discussion in Debate & Current Affairs »Entertainment forumsOther interestsFind more discussion in Entertainment ». The alpha-4 beta-2 nicotinic receptor, also known as the α4β2 receptor, is a type of nicotinic acetylcholine receptor implicated in learning, consisting of α4 and β2 subunits. It is located in the brain, where activation yields post-and presynaptic excitation, mainly by increased Na + and K + permeability.. The top two points seem fine, no problems there. Not sure entirely what context this is being used in - what level are you studying at? Your working for the (alpha + beta)^3 seems to be correct as well, if that's all you are trying to show..