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:
 Molecular analysis indicated that inactivation of H - 2L expression in nearly every null clone resulted from an apparent deletion or rearrangement of 5 ' - flanking and 5 ' - coding H - 2L sequences , with breakpoints consistently mapping to within a 550 bp GC - rich region between exon 1 and the middle of intron 2 .

Ex Output:
H - 2L


Ex Input:
 Vibrio cholerae iron transport : haem transport genes are linked to one of two sets of tonB , exbB , exbD genes .

Ex Output:
exbD genes


Ex Input:
 This study demonstrates a novel link between alterations in platelet - derived growth factor ( PDGF ) regulation of ornithine decarboxylase ( ODC ) expression during malignant conversion .

Ex Output:

ornithine decarboxylase