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HPLC-ESI-MS2 spectra (positive mode) of the Hex4 (A) and Hex4HexNAc (B) glycoforms (m/z 1,876.0 and 2,121.0) of sample 23 from animal 3. MS3 spectra of the fragment ions at m/z 1,145.4 (Aa) and 1,001.4 (Ab), as well as at m/z 1,391.7 (Ba) and 1,002.3 (Bb), are shown.
