Beta-alanine transporter required for the uptake of beta-alanine by the glia (PubMed:28806173). Required for the recycling process of the neurotransmitter histamine in photoreceptor neurons of the compound eye and therefore for photoreceptor synaptic transmission (PubMed:28806173). Following histamine release from photoreceptors and its uptake by glia, histamine is conjugated to beta-alanine by e/Ebony to form the inactive metabolite, carcinine (PubMed:28806173). Expressed in the head and predominantly in the retinal pigment cells of the compound eye. Belongs to the major facilitator (TC 2.A.1) superfamily. Organic cation transporter (TC 2.A.1.19) family.