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.

Input: Consider Input:  The activation of resting T cells for the acquisition of various functions depends on whether CD28 costimulatory signals are provided upon T cell receptor stimulation .

Output: T cell receptor


Input: Consider Input:  Notably , CD28 ligation activated p38 MAPK and CaMKIV , the kinases stimulated by CD3 engagement , suggesting that CD28 acts by increasing the activation extent of p38 MAPK and CaMKIV .

Output: p38 MAPK


Input: Consider Input:  ` ` FP - insensitive ' ' NPs also demonstrated a higher percentage of IL - 5 - positive inflammatory cells expressing GRbeta before and after FP treatment .


Output: IL - 5