抗体的生物素化标记实验要点：

1. Ras蛋白特异鸟嘌呤核苷酸释放因子1抗体费用 如在反应混合液中有叠氮钠或游离氨基存在,会抑制标记反应。因此,蛋白质在反应前要对 0.1mol/L碳酸氢钠缓冲液或0.5mol/L硼酸缓冲液充分透析；

2.所用的NHSB及待生物素化蛋白质之间的分子比按蛋白质表面的ε-氨基的密度会有所不同,选择不当则影响标记的效率,应先用几个不同的分子比来筛选最适条件；

3.用NHSB量过量也是不利的,抗原的结合位点可能因此被封闭,导致抗体失活；

4.由于抗体的氨基不易接近可能造成生物素化不足,此时可加入去污剂如 Triton x-100, Tween20等；

5.当游离ε-氨基(赖氨酸残基的氨基)存在于抗体的抗原结合位点时,或位于酶的催化位点时,生物素化会降低或损伤抗体蛋白的结合力或活性；

6.生物素还可能与不同的功能基团,如羰基、氨基、巯基、异咪唑基及苯酚基,也可与糖基共价结合；

7.交联反应后,应充分透析,否则,残余的生物素会对生物素化抗体与亲和素的结合产生竞争作用；

8.在细胞的荧光标记实验中,中和亲和素的本底低,但由于链霉亲和素含有少量正电荷,故对某些细胞可导致高本底。

产品订购信息：
英文名称  Anti-Rasgrp1 

中文名称   Ras蛋白特异鸟嘌呤核苷酸释放因子1抗体费用 

别    名  Calcium and DAG-regulated guanine nucleotide exchange factor II; CALDAG-GEFI; CALDAG-GEFII; Guanine nucleotide exchange factor, calcium and DAG regulated, Rap1A; hRasGRP1; Ras activator RasGRP; RAS guanyl nucleotide releasing protein 1; RAS guanyl releasing protein 1 (calcium and DAG-regulated); RAS guanyl releasing protein 1; RASGRP; RASGRP1; GRP1_HUMAN.

浓    度   1mg/1ml

规 格  0.2ml/200μg

抗体来源   Rabbit

克隆类型   polyclonal

交叉反应   Human, Mouse, Rat, Pig, Horse, Rabbit 

产品类型   一抗  

研究领域     神经生物学 信号转导 结合蛋白 G蛋白偶联受体 G蛋白信号

蛋白分子量  predicted molecular weight: 90kDa

性    状   Lyophilized or Liquid

免 疫 原 KLH conjugated synthetic peptide derived from human Rasgrp1 (165-210aa) 

亚    型   IgG

纯化方法   affinity purified by Protein A

储 存 液   Preservative: 15mM Sodium Azide, Constituents: 1% BSA, 0.01M PBS, pH 7.4

Ras蛋白特异鸟嘌呤核苷酸释放因子1抗体费用 产品应用    WB=1:100-500 ELISA=1:500-1000 IHC-P=1:100-500 IHC-F=1:100-500 ICC=1:100-500 IF=1:100-500

（石蜡切片需做抗原修复） 

 not yet tested in other applications.

 optimal dilutions/concentrations should be determined by the end user.  

保存条件  Store at -20 °C for one year. Avoid repeated freeze/thaw cycles. The lyophilized antibody is stable at room temperature for at least one month and for greater than a year when kept at -20°C. When reconstituted in sterile pH 7.4 0.01M PBS or diluent of antibody the antibody is stable for at least two weeks at 2-4 °C. 

Important Note  This product as supplied is intended for research use only, not for use in human, therapeutic or diagnostic applications. 

产品介绍 This gene is a member of a family of genes characterized by the presence of a Ras superfamily guanine nucleotide exchange factor (GEF) domain. It functions as a diacylglycerol (DAG)-regulated nucleotide exchange factor specifically activating Ras through the exchange of bound GDP for GTP. It activates the Erk/MAP kinase cascade and regulates T-cells and B-cells development, homeostasis and differentiation. Alternatively spliced transcript variants encoding different isoforms have been identified. Altered expression of the different isoforms of this protein may be a cause of susceptibility to systemic lupus erythematosus (SLE). [provided by RefSeq, Jul 2008].

Function : RasGRP1 is a Ras-specific exchange factor, which is activated by T-cell receptor (TCR) and promotes TCR-dependent positive selection of thymocytes. RasGRP1 is highly expressed on most T lymphocytic leukemias and is a common site of proviral insertion in retrovirus-induced murine T-cell lymphomas.

Subunit : Forms a signaling complex with DGKZ and HRAS. Interacts with F-actin. Interacts with SKAP1.

Subcellular Location : Cell Membrane, Cytoplasmic, Endoplasmic reticulum and Golgi Apparatus. Found in membrane fraction. Relocalization to the cell membrane upon activation is F-actin-dependent. Translocates to the Golgi in response to phorbol ester or nerve growth factor.

Tissue Specificity : Expressed in brain with higher expression in cerebellum, cerebral cortex and amygdala. Expressed in the hematopoietic system. Expressed in T-cells (at protein level).

DISEASE : Defects in RASGRP1 may contribute to susceptibility to systemic lupus erythematosus (SLE) [MIM:152700]. SLE is a chronic, inflammatory and often febrile multisystemic disorder of connective tissue. It affects principally the skin, joints, kidneys and serosal membranes. SLE is thought to represent a failure of the regulatory mechanisms of the autoimmune system. Note=Aberrantly spliced isoforms and/or diminished levels of RASGRP1 are found in a cohort of SLE patients raising the possibility that dysregulation of this signaling protein contributes to the development of autoimmunity in a subset of SLE patients.

Similarity : Belongs to the RASGRP family.

Contains 2 EF-hand domains.

Contains 1 N-terminal Ras-GEF domain.

Contains 1 phorbol-ester/DAG-type zinc finger.

Contains 1 Ras-GEF domain.

Database links : UniProtKB/Swiss-Prot: O95267.2

抗体的鉴定：

1）Ras蛋白特异鸟嘌呤核苷酸释放因子1抗体费用 抗体的效价鉴定：不管是用于诊断还是用于,制备抗体的目的都是要求较高效价。不同的抗原制备的抗体,要求的效价不一。鉴定效价的方法很多,包括有试管凝集反应,琼脂扩散试验,酶联免疫吸附试验等。常用的抗原所制备的抗体一般都有约成的鉴定效价的方法,以资比较。如制备抗抗体的效价,一般就采用琼脂扩散试验来鉴定。

2）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。

3）抗体亲和力：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。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。

GATA-4(GATA binding factor 4) GATA结合蛋白4抗原Multi-class antibodies规格： 0.5mg

EPHB3 EphB3 / HEK2 兔单抗 (PE) Mouse

Rhesus antibody Rh Phospho-DARPP32(Thr75) 磷酸化多巴胺/cAMP调节磷蛋白抗体 规格 0.1ml

非预染蛋白Marker分子量标准(14.4-116kDa) 2x1000μl/400次 MBI原装

Zyxin 英文名称： 斑联蛋白抗体 0.2ml

DIO2 英文名称： 脱酶2抗体 0.1ml

EPHB3 EphB3 / HEK2 兔单抗 (PE) Mouse

FABP(brain) (Fatty acid-binding protein brain) 脑型脂肪酸结合蛋白抗原Multi-class antibodies规格： 0.5mg

一种基因抗体 Anti-BECN1 0.1ml

Rhesus antibody Rh phospho-EGFR (Ser1026) 磷酸化表皮生长因子受体抗体 规格 0.1ml

优等胎血清 100ml 四季青

ZNF195 英文名称： 锌指蛋白195抗体 0.2ml

DHHC-20 英文名称： 锌指结构蛋白酶20抗体 0.2ml

一种基因抗体 Anti-BECN1 0.1ml

ZAN 英文名称： 透明带黏附蛋白ZAN抗体 0.2ml

DOCK1 英文名称： 细胞质分裂付出蛋白1抗体 0.1ml

磷酸化活化复制因子2抗体 Anti-phospho-ATF2 0.1ml

Anti-Annexin V/PE 荧光素PE标记兔抗人、大、小鼠、Annexin V抗体IgGMulti-class antibodies规格： 0.2ml

Rhesus antibody Rh phospho-EIF4B (Ser540) 磷酸化真核翻译起始因子4B抗体 规格 0.1ml

phospho-eIF4E(pSer209)(phospho-Eukaryotic translation initiation factor 4E) 磷酸化eIF-4E(Ser209)抗原Multi-class antibodies规格： 0.5mg

TNFSF11 Protein Cynomolgus 重组食蟹猴 RANKL / OPGL / TNFSF11 蛋白 (Fc 标签)

caski

ERBB3 Others Rhesus 恒河猴 HER3 / ErbB3 人细胞裂解液 (阳性对照)

Hepa1-6-EGFP(CMV-GFP慢病毒构建稳定株)小鼠细胞 Hepa1-6-EGFP (CMV-GFP leiviral consuct stable sain) of hepatocellular carcinoma cells in mice DMEM+10% FBS

小鼠B淋巴细胞杂交瘤细胞;SH3

人主动脉平滑肌细胞 (HASMC)( 5×105 ) HK-2, 人肾皮质近曲小管上皮细胞 Human

CL-0462UMR-106(大鼠细胞)5×106cells/瓶×2

HA Others H7N9 甲型 H7N9 (A/Shanghai/2/2013) 血凝素 (Hemagglutinin / HA) 杆状病毒-昆虫细胞裂解液 (阳性对照)

人髓核细胞RNAHNPC miRNA5 μg

兔角膜前基质层成纤维细胞;RCFBF 癌细胞，MCF7细胞 Cl.Ly1+2-/9细胞，小鼠T淋巴细胞

人脐内皮细胞;HUV-EC-C

HA Others H5N1 甲型 H5N1 (A/goose/Guiyang/337/2006) 血凝素 (Hemagglutinin / HA) 人细胞裂解液 (阳性对照)

Ras蛋白特异鸟嘌呤核苷酸释放因子1抗体费用 TNFSF11 Protein Cynomolgus 重组食蟹猴 RANKL / OPGL / TNFSF11 蛋白 (Fc 标签)

caski

ERBB3 Others Rhesus 恒河猴 HER3 / ErbB3 人细胞裂解液 (阳性对照)

Hepa1-6-EGFP(CMV-GFP慢病毒构建稳定株)小鼠细胞 Hepa1-6-EGFP (CMV-GFP leiviral consuct stable sain) of hepatocellular carcinoma cells in mice DMEM+10% FBS

小鼠B淋巴细胞杂交瘤细胞;SH3

人主动脉平滑肌细胞 (HASMC)( 5×105 ) HK-2, 人肾皮质近曲小管上皮细胞 Human