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. 2013 Dec 13;3:3497. doi: 10.1038/srep03497

Figure 4. Identification of D-glucosamine as the final step in supporting the presence of chitin in the fossil V. gracilenta.

Figure 4

HPCE chromatograms as well as ESI-MS results give unambiguous evidence that D-glucosamine is present in the investigated samples (b) when compared with results from a chitin standard (a).