Figure 1. Characterization of plasma exosomes from ESCC patients, esophagitis patients, and healthy controls. (A) Shape and structure of plasma exosomes isolated by ultracentrifugation under TEM. (B) Western blots of exosome membrane markers CD63, CD9, and CD81. (C) Sizes of plasma exosomes from ESCC patients, esophagitis patients, and healthy controls were analyzed by NTA.