tokens: Furthermore , we demonstrate that transcription from the MMTV 5 ' LTR is highly active in the absence of Stat5a , a transcription factor that had been shown previously to be required for transcription from the MMTV LTR .
folded_tokens: furthermore , we demonstrate that transcription from the mmtv 5 ' ltr be highly active in the absence of stat5a , a transcription factor that have be show previously to be require for transcription from the mmtv ltr .