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:  Heterotrimeric guanine nucleotide - binding proteins ( G - proteins ) function as signal transducers for a variety of hormone - coupled enzyme and ion transport systems in eukaryotic cells .
Example Output: G - proteins

Example Input:  The Tat protein coded by human immunodeficiency virus ( HIV ) is a strong activator of viral gene expression from the long terminal repeat ( LTR ) .
Example Output: Tat protein

Example Input:  Upstream tissue inhibitor of metalloproteinases - 1 ( TIMP - 1 ) element - 1 , a novel and essential regulatory DNA motif in the human TIMP - 1 gene promoter , directly interacts with a 30 - kDa nuclear protein .
Example Output:
TIMP - 1