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]:  Receptor cleavage by these and other endogenous enzymes may account for previous observations of ` ` abnormal ' ' receptors in cytosols from some leukemic specimens .
[A]: endogenous enzymes


[Q]:  Furthermore , hematopoiesis in mice lacking Gadd45gamma is not impaired and Gadd45gamma - deficient T lymphocytes show normal responses to IL - 2 .
[A]: IL - 2


[Q]:  Moreover , in contrast to normal lymphocytes , the mitogenic stimulation of these patients ' lymphocytes by phytohemagglutinin and concanavalin A was not inhibited by 1 , 25 ( OH ) 2D3 .
[A]:
concanavalin A