PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 28192606-6 2017 Interestingly, metformin reduced the number of phosphorylated histone variant H2AX-positive DNA damage foci and suppressed progerin protein expression, compared to the control. Metformin 15-24 H2A.X variant histone Mus musculus 78-82