F(ab")₂ fragment antibodies are generated by pepsin digestion of whole IgG antibodies to remove most of the Fc region while leaving some of the hinge region. F(ab")₂ fragments have two antigen-binding Fab portions linked together by disulfide bonds and therefore they are divalent. The average molecular weight is about 110 kDa. They are used for specific applications, such as to avoid binding of secondary antibodies to live cells with Fc receptors or to Protein A or Protein G.

Storage and Rehydration: Store freeze-dried solid at 2-8°C. Rehydrate with the indicated volume of dH2O (see product specification sheet) and centrifuge if not clear. Prepare working dilution on day of use. Product is stable for about 6 weeks at 2-8°C as an undiluted liquid.Extended Storage after Rehydration: Aliquot and freeze at -70°C or below. Avoid repeated freezing and thawing. Alternatively, add an equal volume of glycerol (ACS grade or better) for a final concentration of 50%, and store at -20°C as a liquid. Expiration date: one year from date of rehydration. The expiration date may be extended if test results are acceptable for the intended use.

1:100 - 1:800 for most applicationsDilution factors are presented in the form of a range because the optimal dilution is a function of many factors, such as antigen density, permeability, etc. The actual dilution used must be determined empirically.

Alexa Fluor® 647

Alexa Fluor® 647-conjugated antibodies absorb light maximally around 651 nm and fluoresce maximally around 667 nm. They are brighter than Cy5 and DyLight 650 in aqueous mounting media. Alexa Fluor® 647- and APC-conjugated secondary antibodies are the best choice for flow cytometry when secondary antibodies fluorescing at these wavelengths are desired. Alexa Fluor® 647 conjugates are the best choice of far red-emitting dyes for multiple-labeling detection with a confocal microscope.A significant advantage of using Alexa Fluor® 647 over lower wavelength-emitting dyes is the low autofluorescence of biological specimens in this region of the spectrum. However, because of its peak emission at 667 nm, Alexa Fluor® 647 cannot be seen well by eye, and it cannot be excited optimally with a mercury lamp. Therefore, Alexa Fluor® 647 is not recommended for use with conventional epifluorescent microscopes. It is most commonly visualized with a confocal microscope equipped with an appropriate laser for excitation and a far-red detector. Alexa Fluor® 647 conjugates are less expensive alternatives to allophycocyanin conjugates for flow cytometry.

This product is for in vitro research use only. It is not a medical device and it is not intended for diagnostic or therapeutic purposes.

This product is provided under an agreement between Life Technologies Corporation and Jackson ImmunoResearch Laboratories, Inc, and the manufacture, use, sale or import of this product is sold pursuant to a license from Life Technologies Corporation for use of its fluorescent dye technology. The sale of this product is expressly conditioned on the buyer not using the product or its components (1) in manufacturing; (2) to provide a service, information, or data to an unaffiliated third party for payment; (3) for therapeutic, diagnostic or prophylactic purposes; (4) to resell, sell or otherwise transfer this product or its components to any third party, or for any other commercial purposes. For information on purchasing a license to this product for purposes other than research, contact Life Technologies Corporation, 5791 Van Allen Way, Carlsbad, CA 92008 or outlicensing@lifetech.com.

Jackson总部位于美国宾夕法尼的兰卡斯特，距离费城大概有40英里。Jackson在1982年由科学家展开了包括在细胞生物学，蛋白质化学，微生物学，免疫学及产品开发实验研究。我们的目标是为世界各地的研究者能最大选择的提供最高质量的科学试剂以及最棒的技术支持和售后服务。蚂蚁淘向您提醒的是，Jackson产品仅用于研究，不用于诊断或治疗用途。作为美国著名的各种二抗生产公司之一，Jackson在全世界各国设有几十家代理。由于其产品效价高、种类全、价格低廉，因而成为全球各大药厂、试剂盒生产厂、大型实验室采购此类试剂的首选。其产品主要包括：各种纯化的二抗、标记的二抗（AMCA、Cy2、FITC、Cy3、TRITC、RRX、TR、Cy5、长臂生物素、辣根酶和碱磷酶标记）、金标试剂等。

Jackson二抗产品选购简介

为便于客户选购Jackson公司的各种二抗，特将选购时的注意事项摘译如下：

JacksonImmunoResearch的抗体产品线完全，有全球最大的二抗产品库，能提供多种应用类型和需要的二抗产品，其二抗产品本身也具有极高的产品质量和稳定性。以上述产品为例，其HRP酶标山羊抗小鼠二抗，WB实验的应用稀释比率为1:10000-1:200000，也就是说，购买的2ml二抗，实际应用时相当于20L-400L的最终使用液。另外，一次购买大包装，避免了不同批次之前的差异，降低了实验条件本身的误差。作为多家著名品牌的代理商，蚂蚁淘根据国内科研的现实需求，为客户选择最具性价比的二抗及血清产品免疫学解决方案。如果您对Jackson的产品感兴趣，请致电027-84454412到蚂蚁淘科技有限公司问询您所感兴趣的产品类型。

JacksonImmunoResearchLaboratories,INC.专业致力于亲和纯化的二抗和免疫球蛋白的生产及偶联。产品主要销往世界各地的大学和科研院所。该公司位于宾夕法尼亚州费城以西约40英里，始建于1982年，经过40年左右的发展，Jackson的二抗以种类丰富（物种齐全，标记多样，应用广泛）、性价比高、供货迅捷而受到更多科研学者和工业客户的青睐。

Jackson的产品主要有酶标二抗、荧光标记二抗、生物素标记二抗、胶体金标记二抗、封闭血清等等，其中JacksonHRP标记羊抗兔/羊抗鼠二抗，更是很多生产厂家的重要物料之一。苏州蚂蚁淘生物科技有限公司作为Jackson在中国的代理商，备有大量二抗现货，并能提供专业的售前咨询和完善的售后服务。

JacksonImmunoResearchLaboratories,INC.专业致力于亲和纯化的二抗和免疫球蛋白的生产及偶联。产品主要销往世界各地的大学和科研院所。该公司位于宾夕法尼亚州费城以西约40英里，始建于1982年，经过40年左右的发展，Jackson二抗以种类丰富（物种齐全，标记多样，应用广泛）、性价比高、供货迅捷而受到更多科研学者和工业客户的青睐。

Jackson的所有产品均具有极高的纯度和高超的品质，大部分二抗产品以冻干粉形式存在，易于保存和运输；作为二抗的实际生产商（非OEM商），产品的性价比也是非常高的，很多大厂家诸如T.F等也会从JacksonOEM产品。另外厂家完善的库存和供应体系以及高效稳定的纯化技术，保证了大部分二抗产品均能现货形式供应，不同批次的产品质量的稳定性也非常高。

Jackson的产品主要有酶标二抗、荧光标记二抗、生物素标记二抗、胶体金标记二抗、封闭血清等等，其中JacksonHRP标记羊抗兔/羊抗鼠二抗，更是很多生产厂家的重要物料之一。苏州蚂蚁淘生物科技有限公司作为Jackson在中国代理商，备有大量二抗现货，并能提供专业的售前咨询和完善的售后服务。