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.

Ex Input:
In contrast , 50 % downmodulation of HLA - A2 by Nef required 16 to 24 h and about 50 - to 100 - fold - greater concentrations of 4 - HT .

Ex Output:
HLA - A2

Ex Input:
To delineate the mechanisms of transcriptional activation , we recently cloned the 5 ' - flanking region of the MIP - 2 gene .

Ex Output:
MIP - 2

Ex Input:
Correlation of steroid receptors with histologic differentiation in mammary carcinoma .

Ex Output:
steroid receptors