制备了带有新型荧光化合物并带有偶极异喹啉咪唑并[1,2- a ]嗪核心的寡核苷酸。熔解曲线的分析表明,在其末端带有这些荧光标记的DNA双链体的DNA双链体稳定性略有增加。分析了寡核苷酸缀合物的紫外线吸收和荧光性质。荧光标记对双链体形成敏感,因为在366 nm处也观察到协同熔解曲线,并且变性后荧光具有很大的增加。细胞摄取研究允许观察这些荧光标记的寡核苷酸内在HeLa细胞中。
Histamine is a biogenic amine with fundamental roles in circulatory and immune systems. We report a fluorescent small molecule (Histamine Blue) for imaging intracellular histamine in live basophils and macrophages. Histamine Blue is a fluorescent mesoionic acid fluoride that turns on upon reaction with histamine. The selective response of Histamine Blue enabled the visualization of intracellular histamine under different physiological conditions.