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Schematic representation of the five discoidin domain receptor 1 (DDR1) isoforms and of the only DDR2 form. EJXM: extracellular juxta-membrane domain, TD: transmembrane domain, IJXM: intracellular juxta-membrane domain, TKD: tyrosine kinase domain, C-tail: C-terminal part of the receptors. Adapted from [12,17].
