Detection and confirmation of milk adulteration with cheese whey using proteomic-like sample preparation and liquid chromatography-electrospray-tandem mass spectrometry analysis

Cleavage sites for enzymatic digestion of CMP and pseudo-CMP with pepsin. Two peptides are generated: MAIPPKKNQDKTEIPTINT (MAI-INT, 19 amino acids and MW = 2140 Da) originated from CMP and AIPPKKNQDKTEIPTINT (AI-INT, 18 amino acids and MW = 2008 Da) released from pseudo-CMP cleavage.