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]:  Accelerated spontaneous thymocyte death in the absence of TCF - 1 correlates with aberrantly low expression of the anti - apoptotic protein Bcl - x ( L ) .
[A]: TCF - 1


[Q]:  Using electrophoretic mobility shift assays and Western and Northern blot analyses , we studied NF - kappa B1 gene expression during T - cell stimulation via CD2 + CD28 .
[A]: CD2 + CD28


[Q]:  These results indicate that a cellular transduction pathway , dependent on specific PC breakdown , is functional in T lymphocytes and monocytes and may be used by various transmembrane receptors to activate HIV transcription through NF - kappa B - dependent induction of the HIV enhancer .
[A]:
HIV enhancer