TheantibodyACSA-1(astrocytecellsurfaceantigen-1)isspecificforanextracellularepitopeoftheastrocytespecifictransmembraneglycoproteinGLASTinthecentralnervoussystem(CNS).BesidesGLT-1,GLASTisthemostabundantglutamatetransporterandispredominantlyexpressedbyastrocytesinthedevelopingandneonatalmammalianCNS.Alsor
ADIalglia,whichbelongtotheastrocytelineageandplayimportantrolesindevelopment,areknowntoexpressGLAST.Postnatally,radialgliaonlypersistinafewregions,suchasBermanngliainthecerebellum,Müllergliaintheretina,andradialgliainthedentategyrusoftheadulthippocampus.