目錄号 | MX4504-50UG | 售價 | 375.00元 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||
規格 | 50μg | 運輸溫度 | 室溫運輸 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||
其他名稱 | Fluo-4, Acetoxymethyl Ester | 保存溫度 | -20℃幹燥避光(guāng)保存 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||
CAS号 | 273221-67-3 | 有效期 | 至少1年(nián) | |||||||||||||||||||||||||||||||||||||||||||||||||||||||
應用 | 鈣離子熒光(guāng)探針 | 訂購數量 |
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産品簡介:
Fluo-4, AM, Cell Permeant 鈣離子熒光(guāng)探針,超級純 — — Ca2+綠色熒光(guāng)探針Fluo-3的升級版本
【務必注意】:初次使用離子探針的用戶,強烈建議配合:Pluronic F-127, Cell Culture Tested 細胞培養級(MS4301-1G)一(yī)起使用,以提高(gāo)探針的水(shuǐ)溶性和胞内加載性。
搜索關鍵詞: Fluo-4 AM, Cell Permeant 鈣離子熒光(guāng)探針,超級純;Fluo-4,Acetoxymethyl Ester; 可見(jiàn)光(guāng)激發波長(cháng) Ca 2+熒光(guāng)探針;Fluo-3;Fluo-8, AM;Rhod-2, AM;CAS NO:273221-67-3;
Fluo-4是可見(jiàn)光(guāng)激發波長(cháng)Ca2+熒光(guāng)探針Fluo-3的改良版本,通(tōng)過将Fluo-3結構上(shàng)的氯離子(Cl-)替換為(wèi)電(diàn)子吸引力更強的氟離子(F-),使得最大激發波長(cháng)往短波長(cháng)偏移10nm左右。正由于這個(gè)波長(cháng)更接近氩激光(guāng)器(qì)的波長(cháng),則當使用氩激光(guāng)器(qì)來激發探針Fluo-4,能(néng)夠得到(dào)更強的熒光(guāng)強度,比Fluo-3強一(yī)倍。另外,Fluo-4的Ca2+親和力幾乎接近Fluo-3(Fluo-3: Kd=0.4μM、Fluo-4: Kd=0.36μM),因此,使用上(shàng)幾乎同Fluo-3。Ca2+結合後的最大激發波長(cháng)為(wèi)494nm,最大發射波長(cháng)為(wèi)516nm。可通(tōng)過激光(guāng)共聚焦顯微鏡或流式細胞儀來檢測胞内鈣離子水(shuǐ)平的變化。 Fluo-4, AM是Fluo-4的一(yī)種乙酰甲酯衍生(shēng)物(wù),具有細胞膜滲透性,隻需簡單培養,即可輕易進入細胞。一(yī)旦進入細胞内,即被其内酯酶剪切生(shēng)成不具膜滲透性的Fluo-4,從(cóng)而滞留在胞内以發揮相(xiàng)應生(shēng)理功能(néng)。
可見(jiàn)光(guāng)激發Ca2+熒光(guāng)探針的優勢: 與紫外光(guāng)激發的熒光(guāng)探針相(xiàng)比,如Fura-2和Indo-1,可見(jiàn)光(guāng)激發Ca2+探針具有以下(xià)特點: 1)适用于大多(duō)數的激光(guāng)共聚焦測鈣系統,包括共聚焦激發掃描顯微鏡以及流式細胞儀等。 2)具有更強的染料吸收性能(néng),使得更低(dī)濃度的探針即可成功檢測Ca2+變化,從(cóng)而降低(dī)對活細胞的光(guāng)毒性。 3)Ca2+依賴性熒光(guāng)強度增強,對Ca2+變化水(shuǐ)平檢測敏感度更高(gāo)。 4)降低(dī)樣品自(zì)熒光(guāng)以及光(guāng)散射的幹擾。 5)兼容光(guāng)激活探針以及UV-激發試劑,因此更方便于多(duō)參數檢測。 6)無光(guāng)譜偏移。
Fluo-4, AM相(xiàng)比較于Fluo-3的優勢: 1) 激發和發射波長(cháng)往短波長(cháng)偏移10nm,更接近氩激光(guāng)器(qì)的波長(cháng),。因此,當使用488nm進行熒光(guāng)激發,得到(dào)更強的熒光(guāng)信号,比Fluo-3強一(yī)倍。 2) 50μg小(xiǎo)包裝供應,使用方便,且能(néng)很好保證産品的穩定性。
Fluo-4, AM的應用圖片:
Fig. 1, U2OS cells were seeded overnight at 40,000 cells per 100 µL per well in a 96-well black wall/clear bottom costar plate. The growth medium was removed, and the cells were incubated with 100 µl of 4 µMFluo-3, AMorFluo-4, AMin HHBS at 37 °C, 5% CO2incubator for 1 hour. The cells were washed twice with 200 µl HHBS, then imaged with a fluorescence microscope using FITC channel.
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— — Written/Edited by V. Shallan【版權歸MKBio懋康所有】
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引用文獻 [1] Lin W, Xiong J, Jiang Y, Liu H, Bian J, Wang J, Shao Y, Ni B. Fibrillin-1 mutation contributes to Marfan syndrome by inhibiting Cav1.2-mediated cell proliferation in vascular smooth muscle cells. Channels (Austin). 2023 Dec;17(1):2192377. doi: 10.1080/19336950.2023.2192377. PMID: 36972239; PMCID: PMC10054150. Determination of intracellular calcium concentration
Pluronic F-127 was dissolved in DMSO at 0.2 mg/mL. Fluo −4 AM was then dissolved in 20% pluronic F-127 solution to 5 mM Fluo-4 AM solution (MX4540, MKBio, Shanghai, China). 5 mM Fluo-4 AM was diluted with DMEM without phenol red to a final concentration of 5 μM. HASMCs were washed 3 times in PBS, incubated with 5 μM Fluo-4 AM for 30 min and washed 3 times in DMEM without phenol red. HASMCs were then stimulated with 100 nM Cav1.2 agonist. Videos were taken with a Thunder Imaging System (Leica Microsystems), and the fluorescence intensity was analyzed using imageJ.
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