Fura-2 AM,也称Fura-2 pentakis ester,是最常用的检测细胞内钙离子浓度的荧光探针之一。分子式为C44H47N3O24,分子量为1001.9。本Fura-2 AM(钙离子荧光探针)是配制于无水DMSO(anhydrous DMSO)中的储存液,浓度为2mM。Fura-2 AM是一种可以穿透细胞膜的荧光染料。Fura-2 AM的荧光比较弱,最大激发波长为369nm,最大发射波长为478nm,并且其荧光不会随钙离子浓度改变而改变。Fura-2AM进入细胞后可以被细胞内的酯酶剪切形成Fura-2,从而被滞留在细胞内。Fura-2可以和钙离子结合,结合钙离子后在330-350nm激发光下可以产生较强的荧光,而在380nm激发光下则会导致荧光减弱。这样就可以使用340nm和380nm这两个荧光的比值来检测细胞内的钙离子浓度,可以消除不同细胞样品间荧光探针装载效率的差异,荧光探针的渗漏,细胞厚度差异等一些误差因素。Fura-2和钙离子结合后,最大激发波长为335nm(最大激发波长随离子浓度的的不同而有所不同),最大发射波长为505nm。实际检测时推荐使用的激发波长为340nm,发射波长为510nm。如果做双波长检测,则推荐使用的激发波长为340nm和380nm。Fura-2的激发光谱参考下图,不同曲线表示不同钙离子浓度时的激发光谱。用于细胞内钙离子检测时,Fura-2 AM的常用浓度为0.5-5μM。通常用含有0.5-5μM的Fura-2 AM的适当溶液和细胞一起在4-37℃孵育15-60分钟,即可完成荧光探针的装载。 注意事项 : 本Fura-2AM在4℃、冰浴等较低温度情况下会凝固而粘在离心管管底、管壁或管盖内,可以20-25℃水浴温育片刻至全部融解后使用。荧光染料均存在淬灭问题,请尽量注意避光,以减缓荧光淬灭。本产品仅限于专业人员的科学研究用,不得用于临床诊断或治疗,不得用于食品或药品,不得存放于普通住宅内。为了您的安全和健康,请穿实验服并戴一次性手套操作。 Precautions : This product will solidify and adhere to the interior wall of the vial at low temperatures, such as 4℃. Prior to use, it should be defrosted by incubation in a 20-25℃ water bath. Please store this product away from light to minimize fluorescence quenching.This product is for R&D only. Not for drug, household, or other uses.For your safety and health, please wear a lab coat and disposable gloves during the operation.
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Fura-2 AM
CAS number:unknown molecular formula:
overview
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| Chinese alias | - | ||
| English alias | - | ||
| CAS number | unknown | molecular formula | |
| molecular weight | - | Exact mass | 2mM |
| PSA | - | logp | - |
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