Физико-химические свойства новых производных цианиновых красителей в составе конъюгатов с ДНК

Цианиновые красители – один из наиболее часто используемых классов флуоресцентных красителей. Все Cy5 флуоресцируют на длине волны около 660 нм, а Cy7 – в ближнем инфракрасном диапазоне длин волн (700–900 нм), что делает их предпочтительными для биологических исследований, так как в этой области почти отсутствует фоновая флуоресценция клеток. Интенсивность флуоресценции цианиновых красителей часто изменяется после конъюгации с биомолекулами, в том числе с нуклеиновыми кислотами. Кроме того, она может существенно изменяться в результате образования дуплекса модифицированной красителем одноцепочечной ДНК с комплементарной последовательностью. Исследованы физико-химические свойства ряда производных красителей Cy5 и Cy7 с заместителями разной длины в различных положениях молекул в составе конъюгатов с одноцепочечной и двухцепочечной ДНК.

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