T35568
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BODIPY-aminoacetaldehyde diethyl acetal (BAAA-DA) is a stable precursor to BODIPY-aminoacetaldehyde, a cell-permeable fluorescent substrate for aldehyde dehydrogenase (ALDH).1,2BODIPY-aminoacetaldehyde diethyl acetal is converted under acidic conditions to BODIPY-aminoacetaldehyde (BAAA).2BAAA is cell-permeant and is converted intracellularly by ALDH to BODIPY aminoacetate (BAA), which is retained by cells and can be used to identify cells with high ALDH activity.1BAA is a substrate for the efflux pump P-glycoprotein (P-gp) but co-application of BAAA with a P-gp inhibitor, such as verapamil , inhibits BAA efflux.2BAAA-DA has been used to isolate human hematopoietic progenitor cells, which have high ALDH activity, andviaflow cytometry to sort cancer stem cells that contain high levels of ALDH.1,3BAA used in cells can be excited at 488 nm and displays an emission maximum of 512 nm.4
1.Storms, R.W., Trujillo, A.P., Springer, J.B., et al.Isolation of primitive human hematopoietic progenitors on the basis of aldehyde dehydrogenase activityProceedings of the National Academy of Sciences of the United States of America96(16)9118-9123(1999) 2.Smith, C.A., Colvin, M., Storms, R.W., et al.BODIPY aminoacetaldehyde diethyl acetal08010501.81-15(2010) 3.Leng, Z., Yang, Z., Li, L., et al.A reliable method for the sorting and identification of ALDHhigh cancer stem cells by flow cytometryExp. Ther. Med.(2017) 4.Pomper, M.G., Wang, H., Minn, I., et al.Red fluorescent aldehyde dehydrogenase (ALDH) substrate(2015) |
T78040
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Tat-peptide 190-208 TFA是一种融合肽,带有Tat标签,具有细胞渗透性,其对应于大鼠G3BP1残基的190-208序列。Tat来自HIV并被放在该序列中不保守的端部,以提高其细胞内渗透能力。该肽能促进轴突生长,并增加神经元的轴突数量,且可能揭示轴突内在生长机制。在颅内动脉瘤的血管内修复过程中,Tat-peptide 190-208 TFA可发挥缺血保护作用。 |
T78119
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HSV
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Z-L(D-Val)G-CHN2(即Z-LVG-CHN2)是半胱氨酸蛋白酶抑制剂的异构体,作为一种三肽衍生物,模仿了人体半胱氨酸蛋白酶结合中心的部分结构。它可以抑制HSV,并且能有效阻断SARS-COV-2的3CL pro蛋白酶,从而抑制病毒活性(EC50=190 nM),但对脊髓灰质炎病毒复制无显著作用。 |
T37762
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Fura-FF AM is a cell-permeable acetoxymethyl ester of the fluorescence calcium indicator fura-FF (potassium salt) . As fura-FF AM enters cells, it is hydrolyzed by intracellular esterases to produce fura-FF. Fura-FF is a difluorinated derivative of the calcium indicator fura-2 . Unlike, fura-2, fura-FF has negligible magnesium sensitivity, thus reducing interference from this cation. Fura-FF also has a higher calcium dissociation constant than fura-2 (Kd(calcium) = 6 and 0.14 μM, respectively). However, the spectral properties of fura-FF and fura-2 are similar with fura-FF displaying excitation/emission spectra of 365/514 nm in the absence of calcium, with a shift to 339/507 nm in the presence of a high calcium concentration. Low affinity calcium dyes, including fura-FF, are preferred for studying compartments with high concentrations of calcium, such as mitochondria, or in cell systems that have relatively low calcium buffering capacities, such as neuronal dendrites and spines. |
T72388
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CBB1007 hydrochloride,一种可逆的、选择性的高效组蛋白去甲基化酶LSD1的底物竞争性抑制剂,其对hLSD1的IC50值为5.27 uM。 |
T83774
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Shepherdin是人体survivin的79-87氨基酸对应的合成肽,也是survivin与heat shock protein 90 (Hsp90)之间蛋白质-蛋白质相互作用的抑制剂。它以浓度依赖的方式与Hsp90的N末端结构域结合,并在150 µM的浓度下抑制了在分离的人源网状红细胞提取物中重组人survivin与Hsp90之间的相互作用。结合了穿膜肽penetratin或HIV Tat序列的Shepherdin肽结合物,体内外具有抗癌活性。 |
T83941
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Mag-Fura-2 AM是一种可渗透细胞的荧光镁离子(Mg2+)指示剂,对Mg2+具有高度选择性,相较于其他二价离子(Zn2+、Cu2+和Ca2+)。其对Mg2+的选择性超过13,000倍(Mg2+Kd为1.9 nM,相对于Ca2+Kd的25 μM)。激发和发射峰值(λ)分别为369 nm和511 nm。Mag-Fura-2 AM可作为间接指示ATP消耗/产生的指标。 |
T38075
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The rapid, selective, and sensitive sensing of thiols is important in diverse areas of research. This thiofluor 623 responds upon exposure to thiols with an increase in fluorescence intensity of up to 120-fold. The response is selective for thiols and occurs in aqueous media. In the absence of thiols, the probe is essentially non-fluorescent; thiols cause cleavage of the probe, generating a fluorophore with an absorption maximum of 563 nm and emission at 623 nm. The fluorescence quantum yield of the cleaved product, generated in response to thiols, increases in more viscous media, suggesting ideal performance in biological systems and applicability to single-molecule or 2-photon sensing schemes. The thiofluor 623 is cell-permeable and reacts selectively with intracellular thiols. The pseudo-first order rate constant (kobs) depends on substrate (e.g., 2.1 x 10-3 s-1 for cysteine, 2.0 x 10-5 s-1 for human serum albumin). |
T38071
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The biology of highly reactive oxygen radical species is of great interest in many biomedical research disciplines, including neurodegeneration, aging, cancer, and infectious diseases.[1] There are a number of fluorescent reagents, such as 2,7-dichlorodihydrofluorescein (DCDHF), that can be used to detect free radicals, but they have significant limitations due to their facile oxidation by light and numerous non-radical oxidants such as hydrogen peroxide (H2O2). [2] HPF is a cell-permeable aromatic amino-fluorescein derivative that has little intrinsic fluorescence. [3] It undergoes oxidation only by highly reactive oxygen species (hROS) such as the hydroxyl radical, peroxynitrite, and hROS generated from a peroxidase/H2O2 system. It is inert to hypochlorite ion, nitric oxide, hydrogen peroxide (H2O2), superoxide, and other oxidants. Upon oxidation, HPF is converted to the highly fluorescent molecule fluorescein, with excitation/emission maxima of 490/515 nm, respectively, allowing the simple direct detection of highly reactive biological radicals. |
TP1978L1
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11R-VIVIT TFA (592517-80-1 Free base) 是一种 NFAT 抑制剂。 11R-VIVIT TFA 抑制 LPS 或 LPS 加 IFN-γ 诱导的骨髓源性巨噬细胞 (BMDM) 分泌 IL-12 p40、IL-12 p70、IL-23 和 TNF。 11R-VIVIT TFA 减弱 LPS 刺激的 BMDM 中 NO 的产生和 Nos2 mRNA 的表达。 11R-VIVIT TFA 改善结肠炎小鼠模型的症状。 11R-VIVIT TFA 表现出免疫抑制作用并提高小鼠移植物的存活率。 11R-VIVIT TFA 具有细胞渗透性。 |