Complex sentence: FGFRs usually contain an extracellular ligand binding domain, a single transmembrane domain, and an intracellular tyrosine kinase domain, and the extracellular domain specifies which ligand the receptor will bind to and mediates ligand-induced receptor dimerization.
Split into simpler sentences: FGFRs usually contain an extracellular ligand binding domain, a single transmembrane domain, and an intracellular tyrosine kinase domain. The extracellular domain specifies which ligand the receptor will bind to and mediates ligand-induced receptor dimerization.