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Base peak chromatogram of porcine milk from the same sow at prepartum and d 0, 7, and 14 postpartum. Peak identification: peak 1 = lacto-N-tetraose (LNT; 710.27 m/z); peak 2 = 3′-sialyllactose (3′-SL; 636.23 m/z); cps = counts per second. Color version available online.
