intracellular
The amino acid sequences       of these receptors show that they all belong to a large superfamily of receptors        with seven transmembrane domains, which are coupled to their intracellular signal       transduction systems by G-proteins.
The amino acid sequences       of these receptors show that they all belong to a large superfamily of receptors        with seven transmembrane domains, which are coupled to their  @SUBJECT$  @PREDICAT$  @OBJECT$  by G-proteins.