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The nuclear/hormone receptors are an extensive family of ligand-activated transcription factors that recognise DNA targets through a highly conserved, structurally autonomous DNA-binding domain. The compact structure of the DNA-binding domain is supported by two zinc ions, each of which is co-ordinated by the tetrahedral arrangement of thiol groups from four cysteine residues. Metal binding is expected...
Background: SH2 domains have a fundamental role in signal transduction. These domains interact with proteins containing phosphorylated tyrosine residues and, in doing so, mediate the interactions of proteins involved in tyrosine kinase signalling. The issue of specificity in SH2 domain interactions is therefore of great interest in terms of understanding tyrosine kinase signal-transduction pathways...
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