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.

 The N - terminal sequence of the extracellular MEP20 , TKVAS , was found at aa 194 - 198 within the ORF .
extracellular MEP20

 A GT - rich sequence binding the transcription factor Sp1 is crucial for high expression of the human type VII collagen gene ( COL7A1 ) in fibroblasts and keratinocytes .
transcription factor Sp1

 13 : 961 - 969 , 1993 ) suggested that T antigen could mediate transcriptional activation through interaction with the TATA - binding protein , as well as upstream bound transcription factors .

T antigen