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 input: Sox - 4 is important for very early B - cell differentiation , while TCF - 1 / LEF - 1 play a crucial role in early thymocyte development 
Example output: TCF - 1
Example explanation: The gene, TCF - 1 has been tagged as protein since it plays a crucial role in early thymocyte development.
Q:  The Escherichia coli rdgC gene encodes a DNA - binding protein of 34 kDa , whose expression level was at its highest during exponential phase , reaching its maximum at ~ 1000 dimers per cell ( 2 ) .
A:
Escherichia coli