“…Serpin A3–1, an inhibitor of the serine proteases elastase and trypsin, has been detected in bovine milk. A previous study using an iTRAQ-LC-MS quantification–based proteomics approach showed that serpin A3–1 abundance was significantly higher in bovine milk than in goat milk ( Sun, Wang, Sun, & Guo, 2020 ). In the current study, serpin A3–1 was present in goat milk adulterated with bovine milk and could be used to assess such adulteration of goat milk samples.…”