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Human α‐cells exhibit low expression levels of GLP‐1R. (A, B) Immunostaining of human islets for the GLP‐1R, insulin, glucagon, and SST. (C) % of insulin‐, glucagon‐, and SST‐positive cells that express GLP‐1R. Inset in (C): zoom for glucagon positive cells. β‐, α‐, and δ‐cell data were collected from 162 and 173 islets, respectively, from three human donors. One‐way ANOVA; P < 0.001 = ***.
