Highlights
- Easy Handling: Bypass chloroform, phase separation and precipitation steps.
- NGS-Ready: Ultra-pure RNA without phenol carryover. No DNA contamination (DNase I included).
- Non-Biased: Complete RNA recovery without miRNA loss.
Description
| Compatibility | TRIzol®, RNAzol®, QIAzol®, TriPure™, TriSure™ and all other acid-guanidinium-phenol based solutions can be used in place of TRI Reagent®. |
|---|---|
| Equipment | Microcentrifuge, vortex, magstand |
| Sample Inactivation | TRI Reagent® (provided with R2101, R2103, and R2105) inhibits RNase activity and inactivates viruses and other infectious agents. |
| Sample Source | Any sample stored and preserved in TRI Reagent®, TRIzol® or similar (animal cells, tissue, bacteria, yeast, fecal, biological fluids, and in vitro processed RNA (e.g., transcription products, DNase-treated or labeled RNA)). |
| Size Range | Total RNA ≥ 17 nt |
| Yield | 10 µg RNA (binding capacity), ≥ 30 µl (elution volume) |
Q1: Is Direct-zol suitable for very small numbers of cells?
Yes, the Direct-zol MicroPrep (#R2060) is designed and capable of purifying RNA down to single cell inputs (picogram amounts). A sensitive quantification method is needed (e.g. Qubit, qPCR, etc.)
Q2: Is DNase I available for individual purchase?
All kit components are available for purchase separately.
Q3: How to store DNase-I following resuspension?
Lyophilized DNase I is stable at room temperature. Once resuspended, store frozen aliquots. Minimize freeze thaw cycles as much as possible. Freeze thaw will lower DNase activity.
Q4: Is the DNase-I treatment necessary?
If the downstream application requires DNA-free RNA, we recommend performing the DNase I treatment.
Q5: Is the kit compatible with samples stored in DNA/RNA Shield?
Yes, bring samples homogenized and stored in DNA/RNA Shield to room temperature (20-30ºC). Add 3 volume of TRIzol/TRI Reagent and mix well. Proceed with RNA Purification.
Q6: Is it possible to extract proteins with the Direct-zol RNA kits?
Yes, proteins can be Acetone Precipitated post RNA binding step. Please request supplementary protocol from Zymo Research Technical Support.
Q7: Can samples be stored in TRIzol/TRI Reagent prior to processing?
Yes, samples in TRIzol/TRI Reagent or similar are stable overnight at room temperature and can be stored frozen (-80C). Be sure to lyse and homogenize the sample well prior to freezing. Bring the sample to room temperature prior to RNA Purification.
Q8: Is it possible to isolate DNA with the Direct-zol RNA kits?
Direct-zol DNA/RNA (D2080) kits can isolate DNA from TRIzol
Q9: Is the RNA suitable for Next-Gen sequencing or other sensitive downstream applications?
Yes, the RNA is high quality (A260/A280 >1.8, A260/A230 >1.8) and suitable for any downstream application, including NGS, RT-PCR, hybridization, etc.
Q10: Which phenol-based reagents are compatible with Direct-zol?
The Direct-zol kits are compatible with TRI Reagent, TRIzol, Qiazol, RNAzol, TriPure, TriSure, etc., and any other acid-guanidinium phenol-based reagents.
Q11: What is the difference between the Direct-zol RNA and Quick-RNA kits?
Direct-zol is for samples stored/collected into TRIzol/similar reagents. Quick-RNA is for all other samples.
Q12: What is the difference between the Direct-zol RNA MiniPrep and the Direct-zol RNA MiniPrep Plus?
Both kits function the same, the only difference is the RNA binding capacity of the column provided with the kit.
Q13: I ran out of RNA Wash Buffer. Can I use something else?
Yes, use 80% ethanol as a substitute. RNA Wash Buffer is also sold separately.
“Before I discovered this kit, I was isolating RNA the old school way with chloroform and it would take half the day to finish the protocol. The Direct-zol RNA Miniprep kit is AWESOME!It took hardly any time, the protocol was so easy, and my RNA quality was SO much better. Honestly, this kit revolutionized my life at the bench.”
-A. Newhart (The Wistar Institute)
“Simple protocol and yielded good quality of RNA. Only one kit working for all type of tissue, cell and especially biological fluids.”
-Mohan K. (University of Illinois, Chicago)
“Previously I used a protocol that took 3 hours, now I can have my RNA in 20 minutes. What is not to like about that? Just one column and two buffers, I love it.”
-Arjan V. (Indiana University)
Read More| Cat # | Name | Size | Price | |
|---|---|---|---|---|
| D4100-2-3 | MagBinding Beads | 3 ml | $66.00 | |
| D4100-2-12 | MagBinding Beads | 12 ml | $125.00 | |
| W1001-30 | DNase/RNase-Free Water | 30 ml | $22.00 | |
| R1060-2-100 | RNA Prep Buffer | 100 ml | $122.00 | |
| R1060-2-25 | RNA Prep Buffer | 25 ml | $40.00 | |
| R2100-1-20 | Direct-zol Binding Buffer Concentrate | 20 ml | $84.00 | |
| R2100-2-200 | Direct-zol MagBead PreWash | 200 ml | $174.00 | |
| R2130-1-120 | MagBead DNA/RNA Wash 1 | 120 ml | $198.00 | |
| R2130-1-30 | MagBead DNA/RNA Wash 1 | 30 ml | $63.00 | |
| R2130-2-20 | MagBead DNA/RNA Wash 2 | 20 ml | $54.00 | |
| R2130-2-80 | MagBead DNA/RNA Wash 2 | 80 ml | $171.00 | |
| C2002 | Collection Plate | 2 Plates | $22.00 | |
| C2003 | Elution Plate | 2 Plates | $19.00 | |
| C2007-8 | 96-Well Plate Cover Foil | 8 Foils | $18.00 | |
| R2050-1-200 | TRI Reagent | 200 ml | $219.00 | |
| E1010-1-4 | DNA Digestion Buffer | 4 mL | $15.00 | |
| E1010 | DNase I Set | 250 U | $56.00 |
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康乃尔大学应用暨工程物理学(AppliedEngineeringPhysics)副教授KarlA.Kasischke等人成功利用多光子显微技术发现脑部神经细胞(neurons)和星状细胞(astrocytes)之间的如何地交互作用来燃烧氧气和葡萄糖进行糖解作用(glycosis)﹐以达到脑部特别能量的需求。其结果已发表于今年七月的《科学》(Science)杂志上。
该研究团队表示﹐他们根据大脑代谢的辅?烟碱醯胺腺嘌呤双核甘酸(NADH,nicotinamideadeninedinucleotide)两种不同能源状态的影像﹐将最具争议性脑细胞能量代谢的星状细胞—神经元乳酸穿梭(theastrocyte-neuronlactateshuttle)假设作确认与再定义。
KarlA.Kasischke说道﹐在过去十年当中﹐科学家们激烈争议讨论﹐被激活的大脑究竟是进行有氧代谢把葡萄糖彻底分解成水?还是进行无氧状态的糖解作用产生乳酸(lactate)?他表示﹐他们的研究已经发现星状细胞糖解作用伴随着神经活化引发神经性氧化代谢(NeuronalOxidativeMetabolism)将这两种目前对立的说法产生一致性并造成两派双赢的局面。由于他们所使用的多光子显微镜可以让NADH产生内生性荧光影像﹐显示出脑神经内早期氧化代谢终究是持续的﹐并且在约10秒后让星状细胞—神经元乳酸穿梭(theastrocyte-neuronlactateshuttle)作脑细胞晚期的活化作用。神经细胞甚至在休息的时候是不断代谢葡萄糖﹐并且当讯号开始穿越神经细胞时﹐代谢葡萄糖的现象会持续表达﹐然后星状细胞会将代谢葡萄糖所得到的乳酸﹐提供出来做为燃料。
目前医师所使用的脑神经影像技术﹐例如功能性磁共振影像(fMRI,functionalmagneticresonanceimaging)和正子造影系统(PET;positronemissiontomography)虽然可分别探测血流和血氧变化﹐提供医师了解大脑功能变化﹐但是在时间和空间的分辨率却无法满足研究人员的需求。而相较之下﹐多光子显微技术却能提供中枢神经系统(CNS;centralnervoussystem)高分辨率﹐3D立体的组织影像﹐强力地帮助研究人员探讨脑细胞代谢途径。
这场十多年来的争论﹐看来各持己见的双方都没有输。不过﹐最重要的意义是﹐多光子显微技术足以提供大脑代谢等研究功能性方面的应用﹐并且提供给医师较佳的方式来观察中风或阿兹海默症等脑部损害。
全文链接:http://www.sciencemag.org/cgi/reprint/305/5680/50.pdf
缓慢的代谢在许多重要的方面保护了白血病细胞,使得它们能够更好的生存。研究小组还发现了一种针对这一独特代谢状态的实验性药物,并已开始检测它治疗这一疾病的效力。研究人员将相关结果发表在1月17日的《细胞干细胞》(CellStemCell)杂志上。
研究的通讯作者、罗彻斯特大学医学中心癌症中心教授CraigT.Jordan博士正在与一个药物制造商建立合作关系,在这一领域开展进一步的测试。实验室研究中的化合物已被用于临床试验。
Jordan说:“我们认为针对白血病干细胞代谢是一种独特的方法,有潜力广泛应用于几种形式的白血病。我们的研究工作令人感到兴奋,是因为我们鉴别出了一些现正开发用于临床的药物,我们希望其有巨大的潜力,可很快用于改善白血病患者的护理。”
主要研究员、Jordan实验室博士后EleniLagADInou说,当研究小组发现白血病干细胞的代谢与其他的肿瘤细胞如此不同之时,他们集中研究了这一过程的确切作用机制。
他们发现,白血病干细胞是通过一种称作氧化磷酸化的单一过程,在线粒体中生成了它们需要的所有能量。相比之下,其他的癌细胞和正常干细胞还依赖于第二种燃料来源——糖酵解来生成能量。
获得了这一新信息,随后研究人员探索了与氧化磷酸化相关的信号通路,以寻找致命弱点终止这一过程。他们发现一种称作BCL-2的重要基因表达增高,这对于白血病干细胞能量生成至关重要。
研究小组还了解了制药行业处于不同研发阶段的BCL-2抑制药物;Lagadinou和Jordan发现了两种这样的化合物,并在人类白血病样本中对它们进行了测试。研究结果表明,药物倾向性杀死不活跃的、代谢较慢的白血病干细胞。
众所周知,白血病细胞能够长时间休眠,在接受治疗后,可以突然发动另一轮的攻击。
Lagadinou说:“这种治疗有望靶向传统药物相对无法触及的,休眠白血病干细胞亚群。还有重要的一点需要指出,化合物不会损伤正常细胞,因为正常细胞能力利用另一条信号通路来生成能量。”
不会对健康细胞产生毒性,研究人员希望这些药物能够在缓解期靶向这一疾病,此时肃清残余白血病是极其重要的。
白血病,这种血癌可分为四种常见类型:急性髓系白血病(AML)、急性淋巴细胞白血病(ALL)、慢性粒细胞白血病(CML)和慢性淋巴细胞白血病(CLL)。AML在成人中最常见,且最难治疗,其部分原因是它影响了未成熟细胞。每年近5万新病例被确诊,约一半人死亡。
研究人员发现在过去的十年里,许多治疗并非旨在除去白血病根源——“白血病干细胞”,因此从未真正根除这一疾病。
Jordan说,事实上,即便是最现代的癌症治疗也是假设:所有的癌症代谢都依赖于糖酵解作为燃料来源。新研究发现氧化磷酸化是白血病干细胞的唯一燃料来源,这对提出新的改进治疗具有格外的意义(本文来自生物谷)
更多关于细胞学文章:http://www.hbzhan.com/st100044
酶的作用是催化剂,促进或抑制反应的进行.加热主要是通过升高温度加快反应速率,无机催化剂和酶的原理相同,都是通过降低反应的活化能加快反应速率
解析:1.细胞质基质(也叫胞质溶胶)是指除细胞器外细胞质的其余部分。细胞质基质是活细胞进行新陈代谢的主要场所。
2.细胞新陈代谢的次要场所是:细胞核、线粒体基质、叶绿体基质等基质。
现在急需使用这个机器,补试验,不知道哪位能够提供重庆的Seahorse机器信息。非常感谢!
Seahorse细胞代谢分析
美国海马细胞能量代谢实时测定仪/生物能量代谢测定仪XF(SeahorseXFExtracellularFluxAnalyzers)——2009年全球创新技术产品Top10!
美国海马生物科学利用细胞外流量(ExtracellularFlux,XF)检测专利技术,发明了业界第一款海马细胞能量代谢实时测定仪/生物能量代谢测定仪XF24/96,是进行细胞代谢分析、氧呼吸测定、药物代谢分析、线粒体有氧代谢和糖酵解等功能的最佳分析工具。
美国海马细胞能量代谢实时测定仪/生物能量代谢测定仪XF24通过特殊的细胞培养微孔板设计,在测量时临时形成的约5ul微环境中,利用无创的专利光学传感器同步地实时探测溶解氧(OCR)和pH值变化,从而快速了解细胞内两大能量转换途径(线粒体的有氧代谢和糖酵解)的能量代谢状态。在使用XF24的检测过程中,研究人员可以通过预设程序控制在特定时间向待测细胞的培养基中添加多达四种药物,以便研究不同药物对细胞新陈代谢的影响,理解细胞的生物能量变化,快速解析细胞或组织的基础代谢率、ATP转换、膜的完整性、极限呼吸率、线粒体功能,产生氧自由基及超氧化物等有毒物的情况,省时省力,实验数据更科学,更具有说服力。

