Instructions: 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: Biochemical studies have identified a cellular non - P element - encoded DNA binding protein , termed the inverted repeat binding protein ( IRBP ) , that specifically interacts with the outer half of the 31 - bp terminal inverted repeats .
Output:
P element