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 relative volume of the tubulointerstitium was measured by an image analyzer ; deposition of collagen types III and IV and monocyte / macrophage infiltration were histologically examined using specific antibodies .

A: specific antibodies
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Q:  Previously described enhancement of in vitro transcription that was only seen with nuclear extracts derived from B - cell neoplasms corresponding to the late stages of B - cell differentiation was shown to be dependent on the actions of these factor ( s ) on the DNA region within the V kappa gene promoter .

A: V kappa
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Q:  The mechanism of reducing NO production resulting from inhaled NO may involve , in part , the activities of reactive oxygen species and / or nuclear factor - kappaB .

A:
nuclear factor
****