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. Author manuscript; available in PMC: 2014 Jul 25.
Published in final edited form as: Carbohydr Polym. 2013 Apr 15;96(2):503–509. doi: 10.1016/j.carbpol.2013.04.009

Table 2.

Fragment-ions observed in the product-ion spectra of [M - H]− as precursors

samples [M-H]−1 B3 C3 B4 C4 B5 C5 B6 C6 B7 C7 Y2 Y3 Y4 Y5 Y6 Y7 Z3 Z5 Z7
Unsaturated
4-mer GlcNAc 757 554 396 599
6-mer GlcNAc 1136 554 757 933 396
8-mer GlcNAc 1516 536 554 739 757 915 933 1118 1136 1294 1313 599 775 978 1154 1357
Saturated
4-mer GlcNAc 775 572 396 599 581
6-mer GlcNAc 1154 572 757 775 951 396 599 775 978 581
8-mer GlcNAc 1532 554 572 757 775 933 951 1136 1313 599 775 978 1154 1357 581 960 1339
3-mer GlcNAc 599 396
3-mer GlcA 572 396
5-mer GlcNAc 978 581 757 396 599 775
5-mer GlcA 951 757 396 572 775 554
7-mer GlcA 1331 554 572 757 775 934 1136 396 572 775 951 1154