Given the task definition and input, reply with output. 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.

Furthermore , preincubation of lymphocytes with D609 resulted in a significant diminution of ionizing radiation ( IR ) - induced 1 ) production of reactive oxygen species ; 2 ) decrease in intracellular reduced glutathione ; 3 ) oxidative damage to proteins and lipids ; and 4 ) activation of nuclear factor - kappaB .
nuclear factor