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:
The trans - activator protein Tax of human T - cell leukemia virus type I ( HTLV - I ) plays an important role in the development of adult T - cell leukemia through , at least in part , its ability to stimulate cell growth .
answer:
trans - activator

question:
Bcl - 3 protein was also highly expressed in early burst - forming unit - erythroid ( BFU - E ) - derived erythroid precursors ( day 7 ) and decreased during maturation ( days 10 and 14 ) , suggesting that Bcl - 3 is involved in normal erythroid proliferation .
answer:
Bcl - 3

question:
These Raf - responsive cell lines will be useful in elucidating the roles of the MAP kinase cascade on hematopoietic cell differentiation and malignant transformation
answer:
MAP kinase