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]:  Tumors binding more than 5 fmol / mg cytosol protein were classified as ER - positive .
[A]: cytosol protein


[Q]:  Interestingly , addition of PGF ( 2alpha ) , which was not known to affect lymphocytes , dramatically attenuated the deleterious effects of PPAR - gamma agonists on B lymphomas .
[A]: PPAR - gamma


[Q]:  We show in this study , using TCF - 1 beta ( 2 ) - microglobulin double - deficient mice , that these repertoire alterations are not due to Ly - 49 / MHC class I interactions .
[A]:
TCF - 1