申请人:Ying Laiqiang
公开号:US09850382B1
公开(公告)日:2017-12-26
The invention describes the preparation and use of fluorescent stains for nucleic acids derived from unsymmetrical cyanine dyes. The dyes of the invention possess superior fluorescent properties when complexed with nucleic acids, and have utility in any application which requires detection of nucleic acids, such as detection of nucleic acids in solution, in gels, in blots, in microarrays, and in bacteria and cells, and for use in analysis of cell structure, membrane integrity, and function. The dyes of the invention have the formula
where X is O, S, or C(CH3)2; Each of R1 and R6 is independently hydrogen, carboxy, sulfo, sulfonamide, halogen, CN, or alkoxy; Each of t and s is an integer from 0 to 4; R2 is an alkyl, or alkyl group substituted by a carboxy, or a sulfo; R3 is H, C6H4CO2R7, or C6H4CH2N(R7)2, where R7 is an alkyl; R4 is H, alkyl, aryl, halogen, alkoxy, alkylamino, or alkylthio; R5 is an alkyl, aryl, alkyl group substituted by a carboxy, or a sulfo, or —(CH2)a—[O—(CH2)b]m—O—Z, where Z is H, alkyl, or carboxy; each of a and b is an integer from 1 to 4; m is an integer selected from 0 to 4.
该发明描述了从非对称靛蓝染料中衍生的核酸荧光染料的制备和使用。该发明的染料在与核酸形成复合物时具有优越的荧光性能,并在任何需要检测核酸的应用中具有实用性,例如在溶液中检测核酸、在凝胶中检测核酸、在印迹中检测核酸、在微阵列中检测核酸、在细菌和细胞中检测核酸,并用于细胞结构、膜完整性和功能的分析。该发明的染料具有下列结构式:其中X为O、S或C(CH3)2;R1和R6中的每一个独立地为氢、羧基、磺酸基、磺酰胺基、卤素、CN或烷氧基;t和s各自为0到4的整数;R2为烷基或通过羧基或磺酸基取代的烷基基团;R3为H、C6H4CO2R7或C6H4CH2N(R7)2,其中R7为烷基;R4为H、烷基、芳基、卤素、烷氧基、烷基氨基或烷基硫基;R5为烷基、芳基、通过羧基或磺酸基取代的烷基基团,或—(CH2)a—[O—(CH2)b]m—O—Z,其中Z为H、烷基或羧基;a和b各自为1到4的整数;m为从0到4选取的整数。