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Transmission electron micrographs of pLGACs cultured on the mpPLLAm (57.1/42.9 wt%) (m). (A) The cells demonstrated a polarized monolayer with features typical of a glandular epithelium with apical microvilli (mv), secretory granules (g), and a basally positioned nucleus (n). (B) Magnification of the boxed area depicting cells joined by junctional complexes (jc) that included a tight junction zone (tj) near the apical surface.
