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They possess seven transmembrane domains linked by three intracellular and three extracellular loops, an extracellular amino-terminus and an intracytoplasmic C-terminus tail

"GHK-Cu: The Science Behind Copper Peptide Hair Regeneration (2018 Review)." Hairgenetix Research Library, mars 2026

10.1016/j.amjmed.2004.03.039 Am J Med

Carnitine is a naturally occurring inhibitor of thyroid hormone nuclear uptake

The ability to distinguish between R and S forms is crucial, as the R enantiomer is generally considered more biologically active
