LysoSensor®系列探针是对活细胞中的酸性区室(如溶酶体、顶体精子)pH值进行检测的一类荧光探针,该类探针的染色具有向酸性,可通过质子化作用在酸性细胞器内累积。该类探针的这种向酸性可解除染料的荧光淬灭性,使其所发射的荧光强度更强。因此,与LysoTracker系列探针相比,LysoSensor®系列探针随着细胞器的酸化程度其荧光强度呈pH依赖型(向酸)增强。
本品LysoSensor™ Yellow/Blue DND-160 (PDMPO)是一种用于测定溶酶体pH值的比率测量型探针,也是LysoTracker®系列探针中的一种pH依赖型显示双激发和双发射波长的荧光探针,该探针在中性环境中产生蓝色荧光(Ex/Em=329 nm/440 nm),但当所处环境变为偏酸性时,则发射黄色荧光(Ex/Em=384 nm/540 nm)。本品以溶于无水DMSO的1 mM储存液形式提供。
分子式(Molecular Formula) | C20H22N4O3 |
分子量(Molecular Weight) | 366.4188 |
Ex/Em | Ex=329 nm, 384 nm Em=440 nm, 540nm |
pKa | ~4.2 |
结构式(Structure) | ![]() |
冰袋运输。-20℃避光干燥保存,避免反复冻融,有效期一年。
Q: 探针原理?
A: LysoSensor™ Yellow/Blue DND-160 (PDMPO)是一种pH 依赖型显示双激发和双发射波长的荧光探针。
Q: 探针原理?
A: LysoSensor™ Yellow/Blue DND-160 (PDMPO)是一种pH 依赖型显示双激发和双发射波长的荧光探针:
细胞环境 | Ex/Em (nm) | 荧光颜 色 |
pH ≈ 7 ( 中 性) | 329/440 | 蓝色 |
pH <7 ( 酸 性) | 384/540 | 黄色 |
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