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thyroxine
has definitions from the fields of biology,anatomy,biochemistry
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[ noun ] (biology,anatomy,biochemistry) hormone produced by the thyroid glands to regulate metabolism by controlling the rate of oxidation in cells
Synonyms Examples "thyroxine is 65% iodine" Used in print (Jacob Robbins et al., "The thyroid-stimulating...)The mono - and di-iodotyrosine must be coupled to form tri-iodothyronine and thyroxine . Since the circulating thyroid_hormones are the amino_acids thyroxine and tri-iodothyronine ( cf. Section C ) , it is clear that some mechanism must exist in the thyroid_gland for their release from proteins before secretion . A study of their activity on thyroglobulin has shown that thyroxine is not preferentially released and that the degradation proceeds stepwise with the formation of macromolecular intermediates ( Alpers , Petermann and Rall , 1956 ) . This de-iodinating enzyme is effective against mono - and di-iodotyrosine , but does not de-iodinate thyroxine or tri-iodothyronine . The thyroxine and tri-iodothyronine released by proteolysis and so escaping de-iodination presumably diffuse into the blood_stream . Related terms |
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