thyroxine-binding globulin

noun

Medical Definition of thyroxine-binding globulin 

: a blood serum glycoprotein that is synthesized in the liver and that binds tightly to thyroxine and less firmly to triiodothyronine preventing their removal from the blood by the kidneys and releasing them as needed at sites of activity abbreviation TBG

called also thyroid-binding globulin

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