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:
Avian EMILIN was extracted from 19 - day - old embryonic chick aortas and associated blood vessels and purified by ion - exchange chromatography and gel filtration .

Ex Output:
Avian EMILIN

Ex Input:
We prospectively studied serum prolactin ( PRL ) elevation after different types of documented seizures in 17 patients .

Ex Output:
serum prolactin

Ex Input:
The H5 mutants were : DH5 ( all amino acids in D configuration ) and H5F ( where all His are replaced by Phe at positions 3 , 7 , 8 , 15 , 18 , 19 , 21 ) .

Ex Output:
H5 mutants