1Proteins listed are either PK-sensitive and highly biotinylated (>40% biotinylated peptides) or PK-resistant and very highly biotinylated (>50% biotinylated peptides). Three very highly biotinylated
Additional file 1: Supplementary 1 and 2. Scatter plot with log2-transformed label free quantification (LFQ) values from mass spectrometry analysis of the secretomes harvested after 1) 48 h (48) and 2