tokens: Recently , a human transcription elongation factor P-TEFb , consisting of CDK9 kinase , cyclin T and other associated factors , has been shown to interact with Tat to restore Tat activation in HeLa nuclear extract depleted of P-TEFb .
folded_tokens: recently , a human transcription elongation factor p-tefb , consist of cdk9 kinase , cyclin t and other associated factor , have be show to interact with tat to restore tat activation in helum nuclear extract deplete of p-tefb .