![SMOBIO/[PM5100] ExcelBand™ 3-color Pre-stained Protein Ladder, High Range (9-245 kDa), 250 μl x 2/High Range (9-245 kDa), 250 μl x 2/PM5100](images/SMOBIO/image.jpg)
Description
The PM5100 3-color Pre-Stained Protein Ladder High Range is a ready-to-use three-color protein standard with 14 pre-stained proteins covering a wide range of molecular weights from 10 to 245 kDa in Tris-Glycine Buffer (9 to 235 kDa in Bis-Tris (MOPS) buffer and 10 to 235 kDa in Bis-Tris (MES) buffer). Proteins are covalently coupled with different chromophores for easy identification of bands, with three reference proteins carrying enhanced intensity corresponding to a blue band at 20 kDa, green at 40 kDa, and red at 75 kDa, respectively, as separated on SDS-PAGE (Tris-Glycine buffer). The PM5100 3-color Pre-Stained Protein Ladder High Range is designed for monitoring protein separation during SDS-polyacrylamide gel electrophoresis, verification of Western transfer efficiency on membranes (PVDF, nylon, or nitrocellulose) and for approximating the size of proteins.
Features
Ready-to-use — Premixed with a loading buffer for direct loading, no need to boil.
Three reference bands — 75 kDa (red), 40 kDa (green), and 20 kDa (blue)
Contents
Approximately 0.1~0.4 mg/ml of each protein in the buffer (20 mM Tris-phosphate (pH 7.5), 2% SDS, 0.2 mM DTT, 3.6 M urea, and 15% (v/v) glycerol).
Quality Control
Under suggested conditions, PM5100 ExcelBand™ 3-color Pre-Stained Protein Ladder High Range resolves 14 major bands in 15% SDS-PAGE (Tris-Glycine buffer) and after Western blotting to nitrocellulose membrane.
Storage
4°C for 3 months-20°C for 24 months
Specification
Cat. No. | PM5100 |
Series Name | ExcelBand™ |
Product Size | 2 x 250 μl |
MW Range | 10 – 245 kDa |
Band Number | 14 |
Band Color | Red/Green/Blue |
Markered Bands | 75, 40, 20 kDa |
Manual
Manual_PM5100_ExcelBand™ 3-color Pre-stained Protein Ladder, High Range
SDS
SDS_PM5100
Migration patterns and approximate MWs (kDa)
Why are there contrasting results in molecular weights after using different brands of protein markers?
A.Different proteins even with similar molecular weights would exhibit apparent disparity from the resulting SDS PAGE due to the difference in the composition of the protein’s amino acids (e.g. gelatin). The reason for the disparity is due to the amino acids composition that affects the binding of the protein and SDS. Therefore, we can say that protein marker is a handy tool to estimate molecular weight, but there is no absolute molecular weight standard.
B.While running SDS-PAGE, protein mobility can be affected by the composition of the buffer used, gel percentage, the voltage used, running time, as well as if there is a pre-run.
C.Another recommendation for high molecular weight proteins is to prolong the running time to clarify the relative location of bands.
Protein marker Retention Period: Mentioned -20°C and over 2 years. Is it available for 30 months or 36 months? Have you tested this period?
Yes, we have tested our PM2700. The results showed that the PM2700 is stable at -20℃ for at least two years. It has also shown strong performance for more than 36 months under our careful storage. However, we must only suggest a 2 year retention period for the following reasons: There may be a variation in the environment in storage, and improper use may lead to accumulated damage to the proteins and therefore reduce its retention period.
How many times of freezing and thawing are available for protein markers? If it uses 5 μL per load, would the total usage quantity be 50 times x 2 (250 μL x 2 tube)?
Yes, 100 uses (5 μL each time) can be expected if freezing and thawing are conducted carefully and properly at the appropriate temperature. Before each use, make sure the protein marker is thoroughly thawed.
Do you have data comparison for protein molecular weight’s precision with other protein markers?
Yes. Usually, pre-stained marker is written on “estimated molecular weight” for caution. It is known that the analysis of protein size by an SDS-PAGE is only for “estimation” because of the intrinsic variation of amino acid composition in all proteins including stained and non-stained ones. For example, a protein which is highly hydrophilic might show a particular higher position in the SDS-PAGE analysis when compared to a hydrophobic one. We did compare the migration patterns of SMOBIO’s Protein Markers with other brands, and we concluded that it was difficult to define “precision” due to the reasons mentioned above. Therefore, in the product description, we suggest our users to calibrate the MW against their interested proteins. Although it is impossible to define "precision" for molecular weight of proteins in SDS-PAGE, we did compare the migration pattern of pre-stained markers with unstained protein marker (Invitrogen MARK12) for calibration. It is concluded that the estimated molecular weight of SMOBIO’s pre-stained marker shows a curve matching well with that of unstained native proteins (MARK12), representing a good estimation of the MW of each pre-stained protein in the SDS-PAGE analysis.
Will SMOBIO’s Protein Markers/Ladder be washed out during Western blotting process?
SMOBIO’s Protein Markers/Ladder will be only slightly washed out during Western blotting process. However, the excess of Tween-20 (more than 0.2%) in washing buffer will affect SMOBIO’s Protein Markers/Ladder on the transfer membrane.
Here are suggestions for Western blotting process:1. Transfer SMOBIO’s Protein Markers/Ladder to membrane with transfer buffer containing 20% methanol to fix SMOBIO’s Protein Markers/Ladder on membrane. 2. Wash membrane with PBS or TBS containing less than 0.1% Tween-20.
Will SMOBIO’s Protein Markers/Ladder be affected by the stripping/deprobing process with the presence of β-Mercaptoethanol (β-ME)?
In normal circumstances, the presence of βME during the stripping/deprobing process will only slightly affect SMOBIO’s Protein Markers/Ladder. However, the presence of Tween-20 on PVDF membrane during the stripping/deprobing process has adverse effects on SMOBIO’s Protein Markers/Ladder.
Here are suggestions for Western stripping/deprobing process:
1. Wash the PVDF membrane in methanol for 5~10 minutes prior to the stripping/deprobing process to mitigate the adverse effect of Tween-20.2. Recommended stripping buffer (for 1 L): 15 g glycine, 1 g SDS, 10 mL Tween 20. Dissolve in 800 mL distilled water. Adjust pH to 2.2 Bring volume up to 1 L with distilled waterEfficient RNA drug delivery using red blood cell extracellular vesicles
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ExcelBand™ Protein Markers
Ready-to-use— premixed with a loading buffer for direct loading, no need to boil
Broad range— 310 kDa to 5 kDa
Pre-stained bands — for monitoring protein separation during electrophoresis and Western blotting transferring efficiency on membrane
Enhanced bands— for quick reference
YesBlot™ Western Marker I
Ready-to-use — no need of mixing or heating before sample loading
Direct visualization — 10 IgG-binding proteins for direct visualization on Western blots
Pre-stained bands — 4 pre-stained proteins for monitoring protein separation during electrophoresis and Western blotting transferring efficiency on membrane
Wide range — 10 clear bands from 15 to 200 kDa for size estimation
Quick reference — two enhanced bands (30 and 80 kDa)
Q-PAGE™ Precast Gels
User-friendly gel cassette:
Numbered and framed wells for sample loading
Labeled warning sign and green tape as reminder
Enhanced gel performance:
Enhanced gel electrophoresis speed
Better band separation
Stable for shipping at ambient temperature
Easy compatibility:
Available as homogeneous and adjusted gradient gels for a wide range of protein separation.
Compatible with most popular protein electrophoresis systems
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2.磁珠法提取DNA试剂盒
3.DNA提取试剂盒（离心柱法）
4.磁珠法RNA提取试剂盒
5.RNA提取试剂盒（离心柱法）
6.磁珠法植物基因组DNA提取试剂盒
7.反转录试剂盒
8.胶回收试剂盒
9.PCR纯化试剂盒
10.病毒核酸提取试剂盒（磁珠法）
11.土壤基因组DNA提取试剂盒
12.法医样本DNA提取试剂盒（磁珠法）等 1.elisa
常见elisa试剂盒有：
特种蛋白检测elisa试剂盒
如免疫球蛋白,抗链O-aso,类风湿因子RF,C反应蛋白,微量白蛋白,β-2微球蛋白human,铁蛋白,转铁蛋白transferrin等等
肿瘤标志物检测elisa试剂盒：
如肿瘤标志物，组织多肽抗原，肿瘤相关因子，胰腺癌，直肠癌，细胞角蛋白片段，胃肠癌，铁蛋白，糖链抗原，神经特异性稀醇化酶，上皮膜抗原，乳腺癌，人抗小鼠抗体，前列腺，甲胎蛋白，肝癌，甲基苯丙胺，大肠癌，肺癌，大小便隐血检测，癌胚抗原，β-2微球蛋白等等。
食品安全检验elisa试剂盒：
食品中的激素、药物、霉菌毒素、过敏原残留、转基因产品的检测试剂盒，以及微生物、维生素等的检测产品。
植物病毒、细菌、真菌、植物激素和转基因作物的农业诊断试剂盒
动植物疾病诊断类如猪、牛、羊、马等家畜和禽类以及宠物类检测试剂盒
传染病检测elisa试剂盒
如幽门螺杆菌,乙脑,乙肝,丙肝,丁肝,戊肝,庚肝,衣原体,性病,腺病毒,微小病毒B19,天疱疮,水痘-带状疱疹病毒,生殖支原体,伤寒,沙眼,腮腺炎,人型支原体,麻疹,轮状病毒,流行性出血热,淋球菌,莱姆病,柯萨奇,抗解尿支原体,军团菌,结核,胶原,尖锐湿疣,甲肝,脊髓灰质炎,急性胰腺炎尿胰蛋白酶,霍乱,呼吸道合胞病毒,肝吸虫,副流感,肺炎,带状疱疹,传染性单核细胞增多症,层粘蛋白,布鲁氏杆菌,百日咳,白喉,艾柯病毒,EB病毒,A族链球菌等等。
2.免疫共沉淀试剂盒
3.化学发光试剂盒
4.免疫组化试剂盒
5.放射免疫试剂盒
6.免疫荧光试剂盒 1.细胞凋亡试剂盒
2.葡萄糖检测试剂盒
3.支原体检测试剂盒
四、试剂盒使用示例
试剂盒的产生正是为了使实验人员能够摆脱繁重的试剂配制及优化过程，所以试剂盒中一般配备有相应的使用说明书，用户按照说明书不需或只需少量的优化即可得到满意的结果。
⑴试剂盒使用说明书
说明书一般包括公司标志及名称、试剂盒名称、试剂盒组成、保质期、使用领域、使用方法等项目
说明书格式如右图所示：
①一般在页眉页脚处为公司的名称及标志；
②接下来为试剂盒的名称；
③试剂盒组成中应为试剂盒中的所有内容，为了简洁明了，一般以表格的形式表现；
④操作步骤是试剂盒说明书中最重要的部分，内容应准确、简洁、易懂，不能包含带有歧义的句子，更不能含糊其辞，排版上操作步骤应将复杂的步骤拆解，使人一目了然。可以说操作步骤为试剂盒的灵魂。 试剂盒内容（以离心柱型为例）：
一般包括：裂解液RL
去蛋白液RW1
漂洗液RW
RNase free ddH2O
吸附柱（RNase free）
过滤柱（RNase free）
缓冲液
离心管（RNase free）
收集管（RNase free）
此外，还配有一份试剂盒使用说明书，根据不同的生产商，可能还配有不同的试剂，如：DNA酶、溶菌酶等。
使用时一定要根据自己的实验需要购买专用提取试剂盒， 如果不是专用试剂盒，或许能提出RNA，但不能确保其质量以及完整性，会影响RT-PCR、Northern blot、Dot blot、Real time RT PCR、芯片分析、polyA 筛选、体外翻译、RNase 保护分析、分子克隆等后续实验的结果。
当前提取效果好的是QIANGEN公司生产的RNA提取试剂盒，但其售价较高，单次实验费用花费太大，对精度要求不高的实验没有必要购买，当然还有其它的进口试剂盒，但是均存在价格高、订货周期长的问题（如果碰上国内无货的时候，要从国外发货，会等很长一段时间）。普通的提取实验用国产的试剂盒就足以，价格不高，基本上各地均有现货，如天根（目前国内生产的试剂盒中销售面比较广的一种）等，其价格比进口试剂盒要便宜许多，且效果还不错，性价比还可以。
当然，就RNA的提取而言，不一定试剂盒的提取效果就非常好，其实采用一些经典的RNA提取方法，效果也很不错，如：TRIZOL、EDTA等，只是试剂盒使用方便，经典的方法操作复杂一些。向左转|向右转
想通过亲和层析来纯化抗血小板特异性抗体（抗GPIIb/IIIa抗体和抗GPIbα抗体），能否做到呢？谢谢！
看了下说明书，上面没有具体说。感觉捕获抗体和酶标抗体需要对HCP有不同的结合位点才能形成稳定的抗体-HCP-抗体复合物。不知道有没有战友熟悉，求解惑，谢谢！
我的实验是这样的，先纯化质粒，然后做酶切，再纯化DNA。
最后一步其实也可以用切胶回收试剂盒，我怕做不好，所以想选用DNA纯化试剂盒，但不知跟质粒DNA提取试剂盒是否有区别，因为说明书上说可以用Invitrogen的K210001.我搜索看了一席啊，觉得那个是提取质粒的小提啊。所以产生这个疑问，请大侠告知DNA纯化试剂盒与质粒DNA提取试剂盒这两者之间有区别吗？
用哪个公司的DNA纯化试剂盒比较好。谢谢啦！
