| Isotype | IgG |
| Product Type | Polyclonal Antibody |
| Units | 100 µg |
| Host | Rabbit |
| Species reactivity | Drosophila |
| Application | Western Blotting |
BackgroundSphingomyelin synthases are enzymes that mediate the biosynthesis of sphingolipid headgroups. Sphingomyelin synthase 1 and 2 (SMS1 and SMS2) mediate the biosynthesis of sphingomyelin, a central sphingolipid in mammalian cells.In addition to SMS1 and SMS2, a third SMS-related protein, SMSr, is known, however its function remains largely unknown.SMSr also occurs in organisms which lack sphingomyelin, such as the fruit fly Drosophila melanogaster.Its function appears to be biosynthesis of ethanolamine phosphorylceramide (EPC), a sphingolipid structurally related to sphingomyelin.SMSr has also been found in mammals as well.
Synonyms: SMSr
Source
Immunogen: Recombinant SMSr derived from Drosophila .
Product
Product Form: Unconjugated
Formulation: Provided as solution in phosphate buffered saline with 0.08% sodium azide
Purification Method: Ammonium Sulfate Precipitation
Concentration: See vial for concentration
ApplicationsOptimal concentration should be evaluated by serial dilutions.
Functional Analysis: Western Blotting
Positive Control: Recombinant sphingomelin synthase protein
StorageProduct should be stored at -20ºC. Aliquot to avoid freeze/thaw cycles
Product Stability: Products are stable for one year from purchase when stored properly
Shipping Conditions: Ship at ambient temperature, freeze upon arrival
CautionThis product is intended FOR RESEARCH USE ONLY, and FOR TESTS IN VITRO, not for use in diagnostic or therapeutic procedures involving humans or animals. It may contain hazardous ingredients. Please refer to the Safety Data Sheets (SDS) for additional information and proper handling procedures. Dispose product remainders according to local regulations.This datasheet is as accurate as reasonably achievable, but Nordic-MUbio accepts no liability for any inaccuracies or omissions in this information.
References1: Dickson, R. C. (1998) Annu. Rev. Biochem. 67, 27–482: Pewzner-Jung, Y., Ben-Dor, S., and Futerman, A. H. (2006) J. Biol. Chem. 281, 25001–250053: Mandon, E. C., Ehses, I., Rother, J., van Echten, G., and Sandhoff, K. (1992) J. Biol. Chem. 267, 11144–111484: Jeckel, D., Karrenbauer, A., Burger, K. N., van Meer, G., and Wieland, F. (1992) J. Cell Biol. 117, 259–2675: Futerman, A. H., Stieger, B., Hubbard, A. L., and Pagano, R. E. (1990) J. Biol. Chem. 265, 8650–86576: Huitema, K., van den Dikkenberg, J., Brouwers, J. F., and Holthuis, J. C. (2004) EMBO J. 23, 33–447: Yamaoka, S., Miyaji, M., Kitano, T., Umehara, H., and Okazaki, T. (2004) J. Biol. Chem. 279, 18688–186938: Ullman, M. D., and Radin, N. S. (1974) J. Biol. Chem. 249, 1506–15129: Voelker, D. R., and Kennedy, E. P. (1982) Biochemistry 21, 2753–275910: van Helvoort, A., van't Hof, W., Ritsema, T., Sandra, A., and van Meer, G. (1994) J. Biol. Chem. 269, 1763–176911: Muehlenberg, B. A., Sribney, M., and Duffe, M. K. (1972) Can J. Biochem. 50, 166–17312: Hannun, Y. A., and Obeid, L. M. (2002) J. Biol. Chem. 277, 25847–2585013: Wiegmann, K., Schutze, S., Machleidt, T., Witte, D., and Kronke, M. (1994) Cell 78, Spiegel, S., and Milstien, S. (2003) Nat. Rev. Mol. Cell Biol. 4, 397–40714: Ogretmen, B., and Hannun, Y. A. (2004) Nat. Rev. Cancer 4, 604–61615: Holthuis, J. C., Pomorski, T., Raggers, R. J., Sprong, H., and Van Meer, G. (2001) Physiol. Rev. 81, 1689–1723
Protein Reference(s)
Database Name: UniProt
Accession number: Q9VS60
Species Accession: Human
Safety Datasheet(s) for this product:NM_Sodium Azide/wp-content/uploads/SDS/Antibody SDS with Sodium Azide Noridic-MUbio.pdf
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多抗,稀释度更大,特异性相对较差,容易出现多条带。
兔的单克隆抗体和鼠的单克隆抗体在使用上不会有什么区别。
用来很多抗体,许多时候觉得单抗多抗也未必是理论上那样的。单抗做不好的也有,多抗条带唯一且清晰的也有。
而且很多蛋白的抗体未必有那么多的选择。
抗原有两个基本特性,即抗原性和免疫原性。有抗原性的物质不一定有免疫原性,所以由此引出半抗原和完全全抗原,半抗原必须经过经过一定的改造(偶联蛋白载体BSA,OVA或者HSA等大分子物质)方能成为完全。一般而言完全抗原分子量越大(大于10KDa),结构越复杂引起免疫反应的能力也就越强。
抗体就是能与特异性抗原结合的免疫球蛋白,抗体一般分为多克隆抗体和单克隆抗体,多克隆抗体能与抗原的多个表位结合。本篇主要讲述兔来源的多克隆抗体的生产步骤
多抗一般制备流程:完全抗原的准备→兔子的免疫→ 效价检测和终放→抗体亲和纯化→抗体的浓缩和保存。
一般来说多克隆的阳性率高一些,但出现假阳性的比例也高一些。
抗体的特异性鉴定 抗体的特异性是指与相应抗原或近似抗原物质的识别能力。抗体的特异性高,它的识别能力就强。衡量特异性通常以交叉反应率来表示。交叉反应率可用竞争抑制试验测定。以不同浓度抗原和近似抗原分别做竞争抑制曲线,计算各自的结合率,求出各自在 IC50时的浓度,并按下列公式计算交叉反应率。 如果所用抗原浓度IC50浓度为pg/管,而一些近似抗原物质的IC50浓度几乎是无穷大时,表示 这一抗血清与其他抗原物质的交叉反应率近似为 0,即该血清的特异性较好。
抗体的亲和力 是指抗体和抗原结合的牢固程度。亲和力的高低是由抗原分子的大小、抗体分子的结合位点与抗原决定簇之间立体构型的合适度决定的。有助于维持抗原抗体复合物稳定的分子间力有氢键、疏水键、侧链相反电荷基因的库仑力、范德华力和空间斥力。亲和力常以亲和常数K表示,K的单位是L/mol,通常K的范围在 108 ~1010 /mol,也有多达 1014 /mol。抗体亲和力的测定对抗体的筛选,确定抗体的用途,验证抗体的均一性等均有重要意义。向左转|向右转

