产品编号 | 产品名称 | 产品包装 | 产品价格 |
P2267-1ml | Rabbit IgG Agarose (兔IgG琼脂糖凝胶) | 1ml | 217.00元 |
P2267-5ml | Rabbit IgG Agarose (兔IgG琼脂糖凝胶) | 5ml | 859.00元 |
碧云天生产的Rabbit IgG Agarose (兔IgG琼脂糖凝胶),也称Rabbit Normal IgG Agarose (兔正常IgG琼脂糖凝胶)、兔IgG IP Agarose (兔IgG 免疫沉淀琼脂糖凝胶)、Rabbit IgG Affinity Gel (兔IgG亲和凝胶)等,由高品质的未经任何标记的非特异性兔IgG (non-specific IgG)与琼脂糖共价偶联而成。本产品通常用作免疫沉淀(Immunoprecipitation, IP)、免疫共沉淀(Co-IP)、染色质免疫沉淀(Chromatin immunoprecipitation, ChIP)等免疫沉淀相关实验时兔来源抗体琼脂糖凝胶的阴性对照(Negative control)。
本兔IgG琼脂糖凝胶中的兔IgG (Rabbit IgG)为正常的兔IgG (Normal Rabbit IgG),是一种未经任何标记的非特异性IgG (non-specific IgG)。
本兔IgG琼脂糖凝胶可以排除IgG本身和一些蛋白或其它生物分子的非特异性结合,从而用于降低背景或作为阴性对照。
本产品非特异吸附低:本产品每毫升凝胶沉淀(settled gel)中IgG的含量高达约5mg IgG(通常每毫升凝胶沉淀中IgG的含量为约1-2mg),用于特异性抗体在免疫沉淀之前的预处理去除非特异性结合(preclean)的效果会非常理想。同时,该琼脂糖凝胶基本不会识别任何抗原。使用量参考目的蛋白等分子免疫沉淀时抗体偶联琼脂糖凝胶的用量。
本产品的主要指标如下表:
Characteristics | Description |
Product content | 50% settled gel in 50% glycerol with 10mM phosphate-buffered saline and preservative (pH7.4) |
Matrix | 4% cross-linked agarose |
Average bead size | ~90μm |
Antibody | Normal Rabbit IgG |
Isotype | Rabbit IgG |
M.W. of antibody | Approximately 150kDa |
Antibody concentration | ~5mg Rabbit IgG per ml settled gel |
Binding capacity | None |
Elution method | Elution with acid, competing peptide or SDS-PAGE loading buffer |
Reagents compatibility | Compatible with commonly used reagents at certain concentrations |
Application | Control for IP、Co-IP,or reduce background |
本产品为50%凝胶悬液,包装体积为总体积,每毫升本产品中共含有0.5ml凝胶沉淀物。
包装清单:产品编号 | 产品名称 | 包装 |
P2267-1ml | Rabbit IgG Agarose (兔IgG琼脂糖凝胶) | 1ml |
P2267-5ml | Rabbit IgG Agarose (兔IgG琼脂糖凝胶) | 5ml |
- | 说明书 | 1份 |
-20℃保存,一年有效。
注意事项:本产品使用前一定要充分重悬,即充分颠倒若干次使混合均匀。
本产品含有微量的防腐剂,不会影响常规的蛋白或蛋白复合物的纯化和免疫沉淀。但如果后续涉及酶活性测定,使用本产品前宜预先使用TBS等适当溶液洗涤凝胶3次,以充分消除防腐剂可能产生的干扰。
在免疫沉淀或纯化时,建议设置阳性和阴性对照组。
蛋白样品收集后宜尽快完成纯化工作,并应始终放置在4℃或冰浴,以减缓蛋白降解或变性。为有效抑制蛋白降解,可以在蛋白样品中添加适量的蛋白酶抑制剂混合物,例如碧云天的P1005/P1006蛋白酶抑制剂混合物(通用型)、P1048/P1049蛋白酶磷酸酶抑制剂混合物(通用型, 质谱兼容, 50X)、P1010/P1011蛋白酶抑制剂混合物(哺乳动物样品抽提用, 100X)、P1050/P1051蛋白酶磷酸酶抑制剂混合物(哺乳动物样品抽提用, 50X)等,或P1025/P1026蛋白酶抑制剂混合物(细菌抽提用)。
高浓度的DTT、巯基乙醇、盐酸胍等对本产品的非特异性结合可能有一定影响,但Western及IP细胞裂解液(P0013)、RIPA裂解液(P0013B/C/D)或NP-40裂解液(P0013F)等都完全适用。碧云天生产的不同裂解液的主要特点和差异,以及如何选择裂解液可参考我们的相关网页:http://www.beyotime.com/support/lysis-buffer.htm。
如果离心不能完全除去蛋白样品中的不溶物,可以将样品溶液用0.45μm的滤膜过滤。
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。
Problem | Possible Causes | Solution |
Large amount of tagged protein found in the flow through. | Binding time is not enough. | If using batch method, increase the binding time experimentally; If using column method, use a lower flow rate when loading samples. |
Column is overloaded. | Reduce the amount of the sample added to the gel or increase the amount of gel. | |
Tag is not accessible to gel. | Expose the epitope tag by adding low amount of denaturant to the protein extract (dialysis may be needed before applying onto gel), or fuse the tag to the other terminus of the target protein. | |
Gel has not been regenerated since last purification. | Perform gel regeneration procedure prior to binding. | |
Reagent compatibility problem. | Dialyze the sample against TBS before purification procedure. | |
The target protein has been degraded. |
1. Prepare fresh lysates. Avoid using frozen lysates. 2. Perform purification at lower temperature, such as 4℃. 3. Use appropriate protease inhibitors in the lysate or increase their concentrations to prevent degradation of the fusion protein. |
|
Very few or no tagged protein exists in the eluate. | Protein is not completely eluted. | Change elution methods. |
No target protein expressed. | Make sure the protein of interest contains the tag by Western blot or dot blot analyses. | |
Very low protein expression level. |
1. Use larger volume of cell lysate. 2. Optimize expression conditions to raise the protein expression level. |
|
Washes are too stringent. |
1. Reduce the number of washes. 2. Avoid adding high concentrations of NaCl to the mixture. 3. Use solutions that contain less or no detergent |
|
Incubation times are inadequate. | Increase the incubation times with the affinity gel (from several hours to overnight). | |
Interfering substance is present in sample. |
1. Lysates containing high concentrations of DTT, 2-mercaptoethanol, or other reducing agents may destroy antibody function, and must be avoided. 2. Excessive detergent concentrations may interfere with the antibody-antigen interaction. Detergent levels in buffers may be reduced by dilution. |
|
Detection system is inadequate. | If Western blot detection is used: 1. Check primary and secondary antibodies using proper controls to confirm binding and reactivity. 2. Verify that the transfer was adequate by staining the membrane with Ponceau S. 3. Use fresh detection substrate or try a different detection system. |
|
Multiple protein bands found in the eluate. | The protein is not stable at room temperature. | Purify the target protein at lower temperature, such as 4℃. |
Protein degradation due to proteases activity during purification process. | Add protease inhibitors to cell lysate. | |
Non-specific binding. |
1. Prepare cell lysate again. 2. Add additional wash steps. |
|
Background is too high. | Proteins bind nonspecifically to the monoclonal antibody, the gel beads, or the microcentrifuge tubes. |
1. Pre-clear lysate with Mouse IgG Agarose (P2265) or Rabbit IgG Agarose (P2267) to remove nonspecific binding proteins. 2. After suspending beads for the final wash, transfer entire sample to a clean microcentrifuge tube before centrifugation. |
Washes are insufficient. |
1. Increase the number of washes. 2. Prolong duration of the washes, incubating each wash for at least 15 minutes. 3. Increase the salt and/or detergent concentrations in the wash solutions. 4. Centrifuge at lower speed to avoid nonspecific trapping of denatured proteins from the lysate during the initial centrifugation of the affinity gel complexes. |
产品编号 | 产品名称 | 包装 |
P2265-1ml | Mouse IgG Agarose (小鼠IgG琼脂糖凝胶) | 1ml |
P2265-5ml | Mouse IgG Agarose (小鼠IgG琼脂糖凝胶) | 5ml |
P2267-1ml | Rabbit IgG Agarose (兔IgG琼脂糖凝胶) | 1ml |
P2267-5ml | Rabbit IgG Agarose (兔IgG琼脂糖凝胶) | 5ml |
P2271-0.5ml | Anti-Flag Affinity Gel (Anti-Flag亲和凝胶) | 0.5ml |
P2271-2ml | Anti-Flag Affinity Gel (Anti-Flag亲和凝胶) | 2ml |
P2271-10ml | Anti-Flag Affinity Gel (Anti-Flag亲和凝胶) | 10ml |
P2282-0.5ml | Anti-Flag Affinity Gel (Anti-Flag亲和凝胶) | 0.5ml |
P2282-2ml | Anti-Flag Affinity Gel (Anti-Flag亲和凝胶) | 2ml |
P2282-10ml | Anti-Flag Affinity Gel (Anti-Flag亲和凝胶) | 10ml |
P2285-0.5ml | Anti-Myc Affinity Gel (Anti-Myc亲和凝胶) | 0.5ml |
P2285-2ml | Anti-Myc Affinity Gel (Anti-Myc亲和凝胶) | 2ml |
P2285-10ml | Anti-Myc Affinity Gel (Anti-Myc亲和凝胶) | 10ml |
P2287-0.5ml | Anti-HA Affinity Gel (Anti-HA亲和凝胶) | 0.5ml |
P2287-2ml | Anti-HA Affinity Gel (Anti-HA亲和凝胶) | 2ml |
P2287-10ml | Anti-HA Affinity Gel (Anti-HA亲和凝胶) | 10ml |
P2289-0.5ml | Anti-V5 Affinity Gel (Anti-V5亲和凝胶) | 0.5ml |
P2289-2ml | Anti-V5 Affinity Gel (Anti-V5亲和凝胶) | 2ml |
P2289-10ml | Anti-V5 Affinity Gel (Anti-V5亲和凝胶) | 10ml |