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https://www.selleckchem.com/products/abc294640.html Kainate receptors belong to the ionotropic glutamate receptor family and play critical roles in the regulation of synaptic networks. The kainate receptor subunit GluK3 has unique functional properties and contributes to presynaptic facilitation at the hippocampal mossy fiber synapses along with roles at the post-synapses. To gain structural insights into the unique functional properties and dynamics of GluK3 receptor, we imaged them via electron microscopy in the apo-state and in complex with either agonist kainate or antagonist UBP301. Our analysis of all the GluK3 full-length structures not only provides insights into the receptor transitions between desensitized and closed states but also reveals a "non-classical" conformation of neurotransmitter binding domain in the closed-state distinct from that observed in AMPA and other kainate receptor structures. We show by molecular dynamics simulations that Asp759 influences the stability of the LBD dimers and hence could be responsible for the observed conformational variability and dynamics of the GluK3 via electron microscopy. Lower dimer stability could explain faster desensitization and low agonist sensitivity of GluK3. In overview, our work helps to associate biochemistry and physiology of GluK3 receptors with their structural biology and offers structural insights into the unique functional properties of these atypical receptors. In the present work, the chemical composition of the Chilean freshwater crab Aegla cholchol exoskeleton was studied for the first time. α-Chitin was isolated from three main body parts (pincers, legs, carapace), and its content ranged from 9.0-10.4% (w/w). Moreover, chitosan was extracted by alkaline treatment at different temperature and time regimes. Aegla cholchol exoskeleton, chitin and chitosans were characterized by FTIR, TGA, and SEM. Chemical structure of chitin and chitosan was confirmed by NMR spectroscopy. Chitosan molecular

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