2P-533Poster: October 20 (Thu) 17:00Room Poster (Hall No.1 1F/2F, Hall No.2 1F, Kobe International Exhibition Hall) Direct observation of double-strand breaks in giant DNA and protection by antioxidant vitamins: Tomoko Kito, Naho Oda, Yuko YoshikawaKeywords: DNA-DAMAGE; SINGLE-MOLECULE; RETINOIC-ACID