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.
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Question:  Although many of these transcription factors have putative roles based on murine knockout experiments , their function in human lymphoid development is less known and was studied further .

Answer: transcription factors


Question:  Positive and negative regulation of granulopoiesis by endogenous RARalpha .

Answer: endogenous RARalpha


Question:  Expression of activated Raf oncoproteins also abrogated cytokine dependency and prevented apoptosis of TF - 1 cells .

Answer:
Raf oncoproteins