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- W4281570241 abstract "Chitin is a key component of hard parts in many organisms, but the biosynthesis of the two distinctive chitin allomorphs, α- and β-chitin, is not well-understood. The accurate determination of chitin allomorphs in natural biomaterials is vital. Many chitin-secreting living organisms, however, produce poorly crystalline chitin which leads to spectrums with only broad lines and imprecise peak positions under conventional analytical methods such as X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FT-IR), and solid state nuclear magnetic resonance spectroscopy (NMR), resulting in inconclusive identification of chitin allomorphs. Here, we developed a novel method for discerning chitin allomorphs based on their different complexation capacity and guest selectivity, using ethylenediamine (EDA) as a complexing agent. From the peak shift observed in XRD profiles of the chitin/EDA complex, the chitin allomorphs can be clearly discerned. By testing this method on a series of samples with different chitin allomorphs and crystallinity, we show that the sensitivity is sufficiently high to detect the chitin allomorphs even in poorly crystalline samples. This is a powerful tool for determining the chitin allomorphs in phylogenetically important chitin-producing organisms and will pave the way to clarify the evolution and mechanism of chitin biosynthesis." @default.
- W4281570241 created "2022-05-27" @default.
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- W4281570241 date "2022-05-16" @default.
- W4281570241 modified "2023-10-01" @default.
- W4281570241 title "Identification of chitin allomorphs in poorly crystalline samples based on the complexation with ethylenediamine" @default.
- W4281570241 doi "https://doi.org/10.26434/chemrxiv-2022-5mj8x" @default.
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