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:  The relationship between human immunodeficiency virus type 1 ( HIV - 1 ) infection and the induction of NF - kappa B binding activity was examined in a myeloid cell model of HIV - 1 infection derived from the PLB - 985 cell line .

A: HIV - 1
****
Q:  However , these compounds did not have a significant effect on SDF1 alpha - induced mitogen - activated protein kinase activity .

A: SDF1 alpha
****
Q:  Tax703 preferentially activated the kappaB element but not the CRE - like one , whereas TaxM22 showed the reverse .

A:
kappaB element
****