Erregistroa posta elektronikoz bidali: A novel TRH analog, Glp–Asn–Pro–D-Tyr–D-TrpNH(2), binds to [(3)H][3-Me-His(2)]TRH-labelled sites in rat hippocampus and cortex but not pituitary or heterologous cells expressing TRHR1 or TRHR2