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What is a Graphene Field Effect Transistor?

What is a Graphene Field Effect Transistor?
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Perig Shutterstock , Journal Of The Electrochemical Society , Graphene Field Effect , Operation Principles , Recent Advances , Materials Today ,

Structural basis of lipid head group entry to the Kennedy pathway by FLVCR1

Phosphatidylcholine and phosphatidylethanolamine, the two most abundant phospholipids in mammalian cells, are synthesized de novo by the Kennedy pathway from choline and ethanolamine, respectively1–6. Despite the essential roles of these lipids, the mechanisms that enable the cellular uptake of choline and ethanolamine remain unknown. Here we show that the protein encoded by FLVCR1, whose mutation leads to the neurodegenerative syndrome posterior column ataxia and retinitis pigmentosa7–9, transports extracellular choline and ethanolamine into cells for phosphorylation by downstream kinases to initiate the Kennedy pathway. Structures of FLVCR1 in the presence of choline and ethanolamine reveal that both metabolites bind to a common binding site comprising aromatic and polar residues. Despite binding to a common site, FLVCR1 interacts in different ways with the larger quaternary amine of choline in and with the primary amine of ethanolamine. Structure-guided mutagenesis ident ....

Clustal Omega , Acta Crystallogr , Send Energy , Aspects Med , Lipid Res , Acids Res , Cell Biol , Acta Lipids Lipid , Resolution Revolution , Recent Advances ,