Figure 2.

Characterization of proteins in apical and basal secretomes. Identified proteins (n = 243) in apical and basolateral secretions of all normal HBE cell cultures (n = 3) after incubating in protein-free media for 24 hours and excluding cytokeratins (n = 29). (A) Classification of protein location based on Uniprot and SecretomeP databases; exosome distinction based on previous study (27). (B) Adjusted protein characterization based on abundance determined by average normalized spectral count of detected peptides (from ProteoIQ).