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: We have also detected a DNA - protein interaction that may be involved in the cell - type specificity of immunoglobulin expression , and we have determined that a sequence upstream of the octamer participates in an interaction with a nuclear protein ( s ) .

Output: nuclear protein

Input: Consider Input: The present study first shows that OX40 - gp34 interaction stimulates HIV - 1 expression and suggests that OX40 triggering by gp34 may play an important role in enhancing HIV - 1 production in both acutely and latently infected CD4 ( + ) T cells in vivo .

Output: HIV - 1

Input: Consider Input: No changes in the number of binding sites was noted before 1 week and the diminished number persisted for 1 week after discontinuation of glucocorticoid treatment .
Output: binding sites