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 Q]: We also show that the products of both the GIY - YIG ORF and the non - canonical LAGLI - DADG - GIY - YIG ORF , which is generated by its integration , have endonuclease activities which recognize and cut the insertion site of the optional sequence .
[EX A]: GIY - YIG

[EX Q]: In addition , Fc epsilon R1 cross - linking activates PI 3 - kinase .
[EX A]: Fc epsilon R1

[EX Q]: In this study , a site of PDGF - induced tyrosine phosphorylation was mapped to Tyr 138 in the SH3 domain ; Tyr 138 is exposed on the SH3 peptide binding surface .
[EX A]:
SH3 domain