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TMalphaDB and TMbetaDB: Web servers to study the structural role of sequence motifs in α-helix and β-barrel domains of membrane proteins

Membrane proteins represent over 25 % of human protein genes and account for more than 60 % of drug targets due to their accessibility from the extracellular environment. The increasing number of available crystal structures of these proteins in the Protein Data Bank permits an initial estimation of their structural properties. |