Melatonin binding sites in the thymus, bursa of Fabricius and spleen of rodents and birds were studied with 2-[125 I]iodomelatonin(125 l]M)as a radioligand.

• 应用放射配体结合法检测大鼠、小鼠、仓鼠、鸡、鸭、鸽子及鹌鹑的胸腺、腔上囊及脾脏的[~(125)I]褪黑素(M)特异结合位点。