Given the task definition, example input & output, solve the new input case.
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.
Example: Sox - 4 is important for very early B - cell differentiation , while TCF - 1 / LEF - 1 play a crucial role in early thymocyte development 
Output: TCF - 1
The gene, TCF - 1 has been tagged as protein since it plays a crucial role in early thymocyte development.

New input case for you:  Using 32P - labeled Egr consensus oligonucleotide , we observed induction of DNA - binding activity in nuclear extracts from hypoxic lung and HeLa cells because of activation of Egr - 1 , by means of supershift analysis .
Output:
Egr - 1