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.

Input: Consider Input:  MATERIALS AND METHODS : We screened a panel of acute myeloid leukemia - derived cell lines for TNF - alpha - responsiveness .

Output: TNF - alpha


Input: Consider Input:  The relative volume of the tubulointerstitium was measured by an image analyzer ; deposition of collagen types III and IV and monocyte / macrophage infiltration were histologically examined using specific antibodies .

Output: specific antibodies


Input: Consider Input:  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 .


Output: transcription factor