Cellular morphology, adhesion, and motility occur through dynamic reorganization of actin-based superstructures. Actin-binding proteins are critical for regulating actin polymerization and superstructure formation. The Arp2/3 complex is an actin polymerization-inducing complex that includes Arp2, Arp3, p41-Arc, p34-Arc, p21-Arc, p20-Arc, and p16-Arc. Several nucleation promoting factors, such as WASP and coronin, regulate the activity of the Arp2/3 complex. In addition, the Arp2/3 complex may be regulated by phosphorylation of specific subunits in the complex. Arp2 has two phosphosites, Thr-237 and Thr-238, that are evolutionarily conserved, and are phosphorylated along with Tyr-202 in response to growth factor stimulation. p41-Arc (Arpc1b) subunit Arpc1 has two isoforms in humans, Arpc1a and Arpc1b. PAK1 can bind and phosphorylate Thr-21 in Arpc1b leading to growth factor-stimulated cell motility. In addition, Arpc1b colocalizes with γ-tubulin at centrosomes and stimulates Aurora A activity.
References
Western blot of Arpc1b phosphorylation inA431 stimulated with calyculin A (100 nM) for 30 min (lanes 1 & 3). The blots were treated with lambda phosphatase to remove phosphorylation (lanes 2 & 4), then probed with anti-Arpc1b (C-terminal region) (lanes 1 & 2) or anti-Arpc1b (Thr-21) (lanes 3 & 4).
Immunocytochemical labeling of Arp2 phosphorylation in rat PC12 cells differentiated with NGF. The cells were probed with Arp2 (C-terminal region) and Arp2 (Thr-237/Thr-238) rabbit polyclonal antibodies, then the antibodies were detected using appropriate secondary antibody conjugated to Cy3.
The products are are safely shipped at ambient temperature for both domestic and international shipments. Each product is guaranteed to match the specifications as indicated on the corresponding technical data sheet. Please store at -20C upon arrival for long term storage.
*All molecular weights (MW) are confirmed by comparison to Bio-Rad Rainbow Markers and to western blotmobilities of known proteins with similar MW.
Product References:
AP3871 Osma-Garcia, I.C. et al. (2015) Eur J Immunol. doi: 10.1002 WB: mouse macrophagesAP4351 Kim, Y.B. et al. (2015) J Biol Chem. 290(34):21076 WB: PC3 cellsAP3861 Osma-Garcia, I.C. et al. (2015) Eur J Immunol. doi: 10.1002 WB: mouse macrophagesAP4321 Ho, H. et al. (2013) Pigment Cell Melanoma Res 26(2):218. WB: human A375 melanomaAP4351 Ho, H. et al. (2013) Pigment Cell Melanoma Res 26(2):218. WB: human A375 melanomaAP3861 Spillane, M. et al. (2012) J Neurosci. 32(49):17671. ICC: Chicken embryo neuronAP3871 Kalwa, H. & Michel, T. (2011) J Biol Chem. 286(3):2320. WB: bovine aortic endothelial cellsAP3861 Kalwa, H. & Michel, T. (2011) J Biol Chem. 286(3):2320. WB: bovine aortic endothelial cellsAP3861 Spillane, M. et al. (2011) Dev Neurobiol. 71(9):747. ICC: chick dorsal root gangliaThis kit contains:
| CATALOG# | DESCRIPTION | SIZE | APPLICATIONS | SPECIES REACTIVITY | MW (kDa) |
AP3861 | Arp2 (C-terminal region) Rabbit pAb | 50 μl | WB, E, IP, ICC | Hu, Rt, Ms, Ck, Fr | 44 |
AP3871 | Arp2 (Thr-237/Thr-238), phospho-specific Rabbit pAb | 50 μl | WB, E, ICC | Hu, Rt, Ms, Ck | 44 |
AP4581 | Arp3 (C-terminal region) Rabbit pAb | 50 μl | WB, E, ICC | Hu, Rt, Ms, Ck, F | 47 |
AP4321 | Arpc1b/p41-Arc (C-terminal region) Rabbit pAb | 50 μl | WB, E, IP, ICC | Hu, Rt, Ms, Ck | 41 |
AP4351 | Arpc1b/p41-Arc (Thr-21), phospho-specific Rabbit pAb | 50 μl | WB, E | Hu, Rt, Ms, Ck, F | 41 |
KIT SUMMARY
The Arp2/3 complex kit can be used to detect expression levels of Arp2, Arp3, and Arpc1b in many different species. In addition, phospho-specific antibodies are included to detect phosphorylation of Arp2 (Thr-237/Thr-238) and Arpc1b (Thr-21).
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请各位高手指点一下小弟吧！
要用几种不同材料来做这个实验
还要自己设计试验方法步骤所用仪器用品！
实在很是头疼谢谢！
许多食品属于乳胶体（冰淇淋、豆奶），蛋白质成分在稳定这些胶态体系中通常起着重要的作用。天然乳胶体靠脂肪球“这种“膜”由三酰甘油、磷脂、不溶性脂蛋白和可溶性蛋白的连续吸附层所构成。蛋白质一般对水/油（W/O）型乳胶液的稳定性较差。这可能是因为大多数蛋白质的强亲水性使大量被吸附的蛋白质分子位于界面的水相一侧。蛋白质的表面活性不仅与蛋白质中氨基酸的组成、结构、立体构象、分子中极性和非极性残基的分布与比例，二硫键的数目与交联，以及分子的大小、形状和柔顺性等内在因素有关，而且与外界因素，甚至加工操作有关。凡是能影响蛋白质构象和亲水性与疏水性的环境因素，诸如pH、温度、离子强度和盐的种类、界面的组成、蛋白质浓度、糖类和低分子量表面活性剂，能量的输入，甚至形成界面加工的容器和操作顺序等，都将影响蛋白质的表面活性。
2．起泡性
食品泡沫通常是气泡在连续的液相或含可溶性表面活性剂的半固相中形成的分散体系。种类繁多的泡沫其质地大小不同，例如蛋白质酥皮、蛋糕、棉花糖和某些其他糖果产品、点心顶端配料、冰淇淋、蛋奶酥、啤酒泡沫、奶油冻和面包等。大多数情况下，气体是空气或CO2，连续相是含蛋白质的水溶液或悬浊液。某些食品泡沫是很复杂的胶态体系，例如冰淇淋中存在分散的和群集的脂肪球（多数是固体）、乳胶体（或悬浊液）、分散的冰晶悬浮体，多糖凝胶、糖和蛋白质的浓缩溶液以及空气气泡。各种泡沫的气泡大小不相同，直径从1微米到几cm不等，气泡的大小取决于多种因素，例如，液相的表面张力和粘度、输入的能量，分布均匀的细微气泡可以使食品产生稠性、细腻和松软性，提高分散性和风味感。
3.凝胶性
变性的蛋白质分子聚集并形成有序的蛋白质网络结构过程称为胶凝作用。胶凝是蛋白 质的重要功能性质，在许多食品的制备中起着主要作用，包括各种乳品、果冻、凝结蛋白、明胶凝胶、各种加热的碎肉或鱼制品、大豆蛋白质凝胶、膨化或喷丝的组织化植物蛋白和面包面团的制作等，中国人喜爱的豆腐食品，就是大豆蛋白胶凝作用的产物。蛋白质胶凝作用不仅可用来形成固态粘弹性凝胶，而且还能增稠，提高吸水性和颗粒粘结、乳状液或泡沫的稳定性。
4．溶解度
大豆蛋白质在溶解状态下才能发挥其在食品体系中的功能特性。大豆蛋白质的溶解度是指大豆蛋白质以胶体的形式分散到水中的能力。蛋白质分子的极性表面和所带的净电荷有助于分散体系的稳定。大豆蛋白质的溶解度可以用可溶性氮指数(NSI)和蛋白质分散度指数(PDI)两种方法表示。影响大豆蛋白质溶解度的因素主要包括温度、pH和无机盐。
我最近在做磁珠与蛋白的偶联，想利用测上清液中剩余的蛋白量来检测偶联率，但是我发现交联剂对BCA法检测上清蛋白含量有显然影响，不知道有没有师兄师姐做过，最后是怎么解决偶联率检测的问题的。求教，谢谢！
转谷氨酰胺酶(TG)、过氧化酶(POD)、多酚氧化酶(PPO)交联
戊二醛，便宜，但有毒性
EDC，无毒性，但较贵
SMCC ,DSS,DST MBS,SPDP
