Fig 2. Search results of MS/MS data from Calu-1 secretome analysis vary depending on the database used.

(A) PSMs are classified based on their species specificity. The classifications are PSMs belonging to: the top 30 FBS proteins or the proteins identified from residual FBS in the media or on the surface of the plate (Major in FBS), other FBS proteins (Minor in FBS), bovine proteins not identified by FBS analysis (Other bovine), and none of the species exclusively due to identical sequences (Orthologous peptides). (B) The number of identified proteins. Bovine proteins are subgrouped as in (A). (C) Venn diagram showing human proteins among the identified proteins.