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.

[Q]:  When a longer - 714 to + 78 fragment of the PBGD promoter is used , the - 70 GATA mutant still displays erythroid - specific activity and is cis - activated by the 5 ' HS - 2 enhancer , while the - 100 CCACC mutant is completely inactive in the absence or in the presence of the 5 ' HS - 2 enhancer .
[A]: PBGD promoter


[Q]:  Interestingly , unlike PAK65 , HPK1 does not contain the small GTPase Rac1 / Cdc42 - binding domain and does not bind to either Rac1 or Cdc42 , suggesting that HPK1 . activation is Rac1 / Cdc42 - independent .
[A]: small GTPase


[Q]:  BACKGROUND : Peripheral kappa receptor agonists may provide a new therapeutic approach for the treatment of functional dyspepsia .
[A]:
kappa receptor