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“ Thyroxine , in further contrast to adrenal corticosteroids, produces elevations of the plasma level of tyrosine , and thyroidec-tomy decreases the concentration of tyrosine in plasma (13, 14).”
“Summary Addition of thiouracil to a high tyrosine diet alleviated signs of tyrosine toxicity in the rat, whereas, daily injections of thyroxine aggravated them.”
Proceedings of the Society for Experimental Biology and Medicine. Society for Experimental Biology and Medicine • 1970 | View Paper
“Measui'ements of 14C-tyrosine disappearance from plasma demonstrated that treatment with thyroxine increased the fractional turnover rate of tyrosine.”
Frontiers in Veterinary Science • 2020 | View Paper
“At the same time, investigations were extended in vitro to show that the overall oxidations of tyrosine and of p-hydroxyphenylpyruvate were inhibited by thyroxine , and that tyrosine transaminase was more sensitive to the in vitro action of the hormone than was p-hydroxyphenylpyruvate oxidation.”