In this task, you are given a sentence. You are expected to recognize the name of gene or protein. Although there might be several correct answers, you need to write one of them.
--------
Question: The aromatic hydrocarbon receptor ( AHR ) is a ligand - activated transcription factor that regulates the expression of several drug - metabolizing enzymes and has been implicated in immunosuppression , teratogenesis , cell - specific hyperplasia , and certain types of malignancies and toxicities .

Answer: aromatic hydrocarbon receptor

Question: Antibodies specific to the different members of the Jun and Fos family of transcription factors show that , in gel retardation assays , a Jun - like factor is a component of the H3 . 2 specific complex .

Answer: Fos family

Question: Mapping the 5 ' and 3 ' termini of TED RNAs indicated that the LTRs have a retroviral U3 - R - U5 structural organization that is capable of directing the synthesis of transcripts that represent potential substrates for reverse transcription and intermediates in transposition .

Answer:
TED RNAs