instruction:
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.
question:
 E - selectin expression induced by B . fragilis outer membranes was not blocked by polymixin B .
answer:
E - selectin


question:
 Finally , UUO resulted in activation of nuclear factor - kappaB in wild mice but was inhibited in the OBK of mutant mice .
answer:
nuclear factor


question:
 The differential timing of CD4 and HLA - A2 downmodulation may have implications for HIV pathogenesis and immune evasion .
answer:

HLA - A2