| 摘要 |
PROBLEM TO BE SOLVED: To provide a fluorescent dye which is to be inserted into nucleic acid and detects double stranded DNA with a high sensitivity. SOLUTION: This dye is a fluorescent compd. which contains a fluorescent group selected from the group consisting of benzimidazole, benzothiazole, benzoxazole, phenanthridine, quinoline, acridine, and xanthene covalently bonded to a chain having at least two positive charges, provided the chain has terminal amino groups; when the amino group is substd., the substituent has up to 10 carbon atoms; and when the fluorescent group is phenanthridine, then the phenanthridine has an amino group at the 3- or 8-polision. |
