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.

[EX Q]:  TCF - 1 deficiency resulted in the altered usage of additional Ly - 49 receptors .
[EX A]: TCF - 1

[EX Q]:  It induced NK cell - dependent rejection of tumors , but failed to stimulate systemic T cell - mediated anti - tumor immunity , and synergized with B7 - 1 - mediated immunotherapy to cause the NK cell and CD8 T cell - dependent rejection of larger EL - 4 tumors ( 0 . 4 cm in diameter ) that were refractory to monotherapies .
[EX A]: B7 - 1

[EX Q]:  In 6 cases only there was a strong infiltration of mononuclear cells positive for acid phosphatase .
[EX A]:
acid phosphatase