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.

 No clear correlation could be established between the level of glucocorticoid receptor and the in vitro action of steroids in normal and neoplastic lymphoid tissue .
glucocorticoid receptor

 The role of transcription factor activation in other models of pancreatitis has not been established .
transcription factor

 The Runt family transcription factor CBFalpha2 ( AML1 , PEBP2alphaB , or Runx1 ) is required by hematopoietic stem cells and expressed at high levels in T - lineage cells .

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
transcription factor

