instruction:
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.
question:
Glucocorticoids stimulate ENaC upregulation in bovine mammary epithelium.
answer:
ENaC

question:
Cloning, sequencing, structural and molecular biological characterization of placental protein 20 (PP20)/human thiamin pyrophosphokinase (hTPK).
answer:
placental protein 20

question:
Synthesis and structure-activity relationships of indazole arylsulfonamides as allosteric CC-chemokine receptor 4 (CCR4) antagonists.
answer:
CC-chemokine receptor 4