(RXRs), forming heterodimers. In its inactivated form, the TR inhibits gene transcription by binding corepressors. This adds an additional level of regulation to an already tightly regulated process. When activated, these receptors become associated with other activators and initiate gene transcription. TRs are also involved in cell viability, and are believed to have other non-genomic affects that are currently being investigated.

Mechanism of action

Thyroid hormone is transported into the cell through a transporter. Once

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