PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 12853643-7 2003 However, mutant seedlings were hypersensitive to the DNA-damaging agents methyl methanesulfonate and X-rays, demonstrating that AtLIG4 is required for the repair of DNA damage. Methyl Methanesulfonate 73-96 DNA ligase IV Arabidopsis thaliana 128-134