illion abstracts. Problem. How to find sentences that talk about protein-protein interactions? Example (Non-Interaction Sentence) All our data are consistent with models in which RAD17, RAD24 and MEC3 are coordinately required for the activity of one or more DNA repair pathways that link DNA damage to cell cycle arrest. Example (Interaction Sentence) The head domain of talin thus binds to integrins to form a link to the actin cytoskeleton and can thus regulate integrin function. 2