Summary
It can be shown by light and electron microscopic autoradiography that125I triiodothyronine and125I thyroxine bind to the cell membrane ofTetrahymena. For thyroxine the finer localization is at the cilia as well as in pinocytotic and food vacuoles. Some grains also appear above the nucleus. On the other hand, insulin only binds to the membrane ofTetrahymena, and binding can be inhibited by unlabelled insulin.
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Csaba, G., Sudár, F., Nagy, S.U. et al. Localization of hormone receptors inTetrahymena . Protoplasma 91, 179–189 (1977). https://doi.org/10.1007/BF01276732
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DOI: https://doi.org/10.1007/BF01276732