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.

Q:  A clinically acceptable synthetic derivative of MDP , namely murabutide ( MB ) , has been found to present interesting pharmacological properties and to suppress HIV - 1 replication in monocyte - derived macrophages ( MDM ) .

A: HIV - 1
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Q:  The status of the TRAIL receptors ( assessed by immunoblotting and flow cytometry ) could not predict TRAIL sensitivity of MM cells .

A: TRAIL receptors
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Q:  We have previously reported that the activation of resting human immature peripheral blood T ( PBT ) lymphocytes is associated with the loss of retinoid X receptor alpha ( RXRalpha ) expression .

A:
retinoid X receptor
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