+,StressMarq/Anti-ATG12 Antibody/SPC-608D-FITC/100-µg,酸碱缓冲液,StressMarq,StressMarq,,fitc,100-µg蚂蚁淘商城

商品信息

联系客服

StressMarq/Anti-ATG12 Antibody/SPC-608D-FITC/100-µg

郑重提醒：

无质量问题不接受退换货，下单前请仔细核对信息。

下单后请及时联系客服核对商品价格，订单生效后再付款。

StressMarq/Anti-ATG12 Antibody/SPC-608D-FITC/100-µg

品牌 /

StressMarq

货号 /

SPC-608D-FITC

官网地址

美元价：

登录查看

(友情提示：该价格仅为参考，欢迎联系客服询价！)

数量：

免费咨询热线

4000-520-616

商品介绍售后保障相关文章商品咨询

联系客服

Overview:

Product Name ATG12 Antibody

Description

Rabbit Anti-Human ATG12 Polyclonal

Species Reactivity Human

Applications WB, ICC/IF

Antibody Dilution WB (1:1000); ICC/IF (1:100); optimal dilutions for assays should be determined by the user.

Host Species Rabbit

Immunogen Species Human

Immunogen Synthetic peptide from the C-terminal of human ATG12

Concentration 1 mg/ml

Conjugates

Alkaline Phosphatase, APC, ATTO 390, ATTO 488, ATTO 565, ATTO 594, ATTO 633, ATTO 655, ATTO 680, ATTO 700, Biotin, FITC, HRP, PE/ATTO 594, PerCP, RPE, Streptavidin, Unconjugated

PerCP

Overview:

Peridinin-Chlorophyll-Protein Complex
Small phycobiliprotein
Isolated from red algae
Large stokes shift (195 nm)
Molecular Weight: 35 kDa

PerCP Datasheet

PerCP Fluorophore Absorption and Emission Spectrum

Optical Properties:

λ_ex = 482 nm

λ_em = 677 nm

ε_max = 1.96 x 10⁶

Laser = 488 nm

PE/ATTO 594

PE/ATTO 594 is a tandem conjugate, where PE is excited at 535 nm and transfers energy to ATTO 594 via FRET (fluorescence resonance energy transfer), which emits at 627 nm.

Overview:

High fluorescence yield
High photostability
Very hydrophilic
Excellent solubility in water
Very little aggregation

PE/ATTO 594 Datasheet

PE-ATTO 594 Fluorophore Conjugate Excitation and Emission Spectra

Optical Properties:

λ_ex = 535 nm

λ_em = 627 nm

Laser = 488 to 561 nm

FITC (Fluorescein)

Overview:

Excellent fluorescence quantum yield
High rate of photobleaching
Good solubility in water
Broad emission spectrum
pH dependent spectra
Molecular formula: C₂₀H₁₂O₅
Molar mass: 332.3 g/mol

FITC-Fluorescent-conjugate

FITC Fluorescein Fluorophore Excitation and Emission Spectra

Optical Properties:

λ_ex = 494 nm

λ_em = 520 nm

ε_max = 7.3×10⁴

Φ_f = 0.92

τ_fl = 5.0 ns

Brightness = 67.2

Laser = 488 nm

Filter set = FITC

ATTO 700

Overview:

High fluorescence yield
Excellent thermal and photostability
Quenched by electron donors
Very hydrophilic
Good solubility in polar solvents
Zwitterionic dye
Molar Mass: 575 g/mol

ATTO 700 Datasheet

ATTO 700 Fluorophore Absorption and Emission Spectrum

Optical Properties:

λ_ex = 700 nm

λ_em = 719 nm

ε_max = 1.25×10⁵

Φ_f = 0.25

τ_fl = 1.6 ns

Brightness = 31.3

Laser = 676 nm

Filter set = Cy®5.5

ATTO 680

Overview:

High fluorescence yield
Excellent thermal and photostability
Quenched by electron donors
Very hydrophilic
Good solubility in polar solvents
Zwitterionic dye
Molar Mass: 631 g/mol

ATTO 680 Datasheet

ATTO 680 Fluorophore Absorption and Emission Spectrum

Optical Properties:

λ_ex = 680 nm

λ_em = 700 nm

ε_max = 1.25×10⁵

Φ_f = 0.30

τ_fl = 1.7 ns

Brightness = 37.5

Laser = 633 – 676 nm

Filter set = Cy®5.5

ATTO 655

Overview:

High fluorescence yield
High thermal and photostability
Excellent ozone resistance
Quenched by electron donors
Very hydrophilic
Good solubility in polar solvents
Zwitterionic dye
Molar Mass: 634 g/mol

ATTO 655 Datasheet

ATTO 655 Fluorophore Absorption and Emission Spectrum

Optical Properties:

λ_ex = 663 nm

λ_em = 684 nm

ε_max = 1.25×10⁵

Φ_f = 0.30

τ_fl = 1.8 ns

Brightness = 37.5

Laser = 633 – 647 nm

Filter set = Cy®5

ATTO 633

Overview:

High fluorescence yield
High thermal and photostability
Moderately hydrophilic
Good solubility in polar solvents
Stable at pH 4 – 11
Cationic dye, perchlorate salt
Molar Mass: 652.2 g/mol

ATTO 633 Datasheet

ATTO 633 Fluorophore Absorption and Emission Spectrum

Optical Properties:

λ_ex = 629 nm

λ_em = 657 nm

ε_max = 1.3×10⁵

Φ_f = 0.64

τ_fl = 3.2 ns

Brightness = 83.2

Laser = 633 nm

Filter set = Cy®5

ATTO 594

Overview:

High fluorescence yield
High photostability
Very hydrophilic
Excellent solubility in water
Very little aggregation
New dye with net charge of -1
Molar Mass: 1137 g/mol

ATTO 594 Datasheet

ATTO 594 Fluorophore Excitation and Emission Spectrum

Optical Properties:

λ_ex = 601 nm

λ_em = 627 nm

ε_max = 1.2×10⁵

Φ_f = 0.85

τ_fl = 3.5 ns

Brightness = 102

Laser = 594 nm

Filter set = Texas Red®

ATTO 565

Overview:

High fluorescence yield
High thermal and photostability
Good solubility in polar solvents
Excellent solubility in water
Very little aggregation
Rhodamine dye derivative
Molar Mass: 611 g/mol

ATTO 565 Datasheet

ATTO 565 Fluorophore Excitation and Emission Spectra

Optical Properties:

λ_ex = 563 nm

λ_em = 592 nm

ε_max = 1.2×10⁵

Φ_f = 0.9

τ_fl = 3.4 n

Brightness = 10

Laser = 532 nm

Filter set = TRITC

ATTO 488

Overview:

High fluorescence yield
High photostability
Very hydrophilic
Excellent solubility in water
Very little aggregation
New dye with net charge of -1
Molar Mass: 804 g/mol

ATTO 488 Datasheet

ATTO 488 Fluorophore Excitation and Emission Spectra

Optical Properties:

λ_ex = 501 nm

λ_em = 523 nm

ε_max = 9.0×10⁴

Φ_f = 0.80

τ_fl = 4.1 ns

Brightness = 72

Laser = 488 nm

Filter set = FITC

ATTO 390

Overview:

High fluorescence yield
Large Stokes-shift (89 nm)
Good photostability
Moderately hydrophilic
Good solubility in polar solvents
Coumarin derivate, uncharged
Low molar mass: 343.42 g/mol

ATTO 390 Datasheet

ATTO 390 Fluorescent Dye Excitation and Emission Spectra

Optical Properties:

λ_ex = 390 nm

λ_em = 479 nm

ε_max = 2.4×10⁴

Φ_f = 0.90

τ_fl = 5.0 ns

Brightness = 21.6

Laser = 365 or 405 nm

APC (Allophycocyanin)

Overview:

High quantum yield
Large phycobiliprotein
6 chromophores per molecule
Isolated from red algae
Molecular Weight: 105 kDa

APC Datasheet

APC Fluorophore Absorption and Emission Spectrum

Optical Properties:

λ_ex = 650 nm

λ_em = 660 nm

ε_max = 7.0×10⁵

Φ_f = 0.68

Brightness = 476

Laser = 594 or 633 nm

Filter set = Cy®5

Streptavidin

Properties:

Homo-tetrameric protein purified from Streptomyces avidinii which binds four biotin molecules with extremely high affinity
Molecular weight: 53 kDa
Formula: C₁₀H₁₆N₂O₃S
Applications: Western blot, immunohistochemistry, and ELISA

Streptavidin Datasheet

Biotin

Properties:

Binds tetrameric avidin proteins including Streptavidin and neuravidin with very high affinity
Molar mass: 244.31 g/mol
Formula: C₁₀H₁₆N₂O₃S
Applications: Western blot, immunohistochemistry, and ELISA

Biotin Datasheet

HRP (Horseradish peroxidase)

Properties:

Enzymatic activity is used to amplify weak signals and increase visibility of a target
Readily combines with hydrogen peroxide (H₂O₂) to form HRP-H₂O₂ complex which can oxidize various hydrogen donors
Catalyzes the conversion of:
- Chromogenic substrates (e.g. TMB, DAB, ABTS) into coloured products
- Chemiluminescent substrates (e.g. luminol and isoluminol) into light emitting products via enhanced chemiluminescence (ECL)
- Fluorogenic substrates (e.g. tyramine, homovanillic acid, and 4-hydroxyphenyl acetic acid) into fluorescent products
High turnover rate enables rapid generation of a strong signal
44 kDa glycoprotein
Extinction coefficient: 100 (403 nm)
Applications: Western blot, immunohistochemistry, and ELISA

HRP Datasheet

AP (Alkaline Phosphatase)

Properties:

Broad enzymatic activity for phosphate esters of alcohols, amines, pyrophosphate, and phenols
Commonly used to dephosphorylate the 5’-termini of DNA and RNA to prevent self-ligation
Catalyzes the conversion of:
- Chromogenic substrates (e.g. pNPP, naphthol AS-TR phosphate, BCIP) into coloured products
- Fluorogenic substrates (e.g. 4-methylumbelliferyl phosphate) into fluorescent products
Molecular weight: 140 kDa
Applications: Western blot, immunohistochemistry, and ELISA

AP Datasheet

R-PE (R-Phycoerythrin)

Overview:

Broad excitation spectrum
High quantum yield
Photostable
Member of the phycobiliprotein family
Isolated from red algae
Excellent solubility in water
Molecular Weight: 250 kDa

R-PE Datasheet

R-PE Fluorophore Excitation and Emission Spectra

Optical Properties:

λ_ex = 565 nm

λ_em = 575 nm

ε_max = 2.0×10⁶

Φ_f = 0.84

Brightness = 1.68 x 10³

Laser = 488 to 561 nm

Filter set = TRITC

Properties

Storage Buffer	PBS, 50% glycerol, 0.09% sodium azide
Storage Temperature	-20ºC
Shipping Temperature	Blue Ice or 4ºC
Purification	Peptide Affinity Purified
Clonality	Polyclonal
Specificity	Predicted molecular weight at ~15.1kDa. Observed molecular weights at ~48-55kDa based on ATG12-ATG5 heterodimer.
Cite This Product	StressMarq Biosciences Cat# SPC-608, RRID: AB_2704853
Certificate of Analysis	A 1:1000 dilution of SPC-608 was sufficient for detection of ATG12 on HeLa cell lysates using Goat anti-rabbit IgG:HRP as the secondary antibody.

Biological Description

Alternative Names	APG12-like Antibody, APG12 Antibody, ATG12_Human Antibody, HAPG12 Antibody, FBR93 Antibody
Research Areas	Cancer, Autophagy, Cardiovascular System, Cell Signaling, Epigenetics and Nuclear Signaling, Heart
Cellular Localization	Cytoplasm
Accession Number	NP_001264712.1
Gene ID	9140
Swiss Prot	O94817
Scientific Background	ATG12 (autophagy-related protein 12), also known as APG12, is a 140 amino acid protein that is ubiquitously expressed and belongs to the ATG12 family of proteins. ATG12 is a homolog of the yeast protein APG12 that participates in autophagy. Autophagy is a membrane trafficking mechanism that delivers cytoplasmic cargo to the vacuole/lysosome for degradation and recycling. In yeast, autophagy requires a protein conjugation system consisting of APG12 covalently bound at the carboxy terminal glycine to lysine 149 of APG5. Similarly in humans, ATG12 is essential for autophagy and localizes to the cytoplasm where it is covalently bound to APG5, a conjugation reaction that requires APG7, ATG10 and ATP (1-3). The ATG12-APG5 conjugate functions as an important regulator of the autophagic process and is required for the change in membrane morphology and development of autophagosomes. Due to alternative splicing events, two ATG12 isoforms exist.
References	1. Mizushima N., Sugita H., Yoshimori T., Ohsumi Y. (1999) J Biol Chem. 273(51): 33889-33892. 2. Mizushuma N., et al. (1998) Nature. 395: 395-398. 3. Suzuki K., et al. (2001) EMBO J. 20: 5971-5981.

Product Images

<p>Immunocytochemistry/Immunofluorescence analysis using Rabbit Anti-ATG12 Polyclonal Antibody (SPC-608). Tissue: Cervical Cancer cell line (HeLa). Species: Human. Fixation: 4% Formaldehyde for 15 min at RT. Primary Antibody: Rabbit Anti-ATG12 Polyclonal Antibody (SPC-608) at 1:100 for 60 min at RT. Secondary Antibody: Goat Anti-Rabbit ATTO 488 at 1:100 for 60 min at RT. Counterstain: DAPI (blue) nuclear stain at 1:5000 for 5 min RT. Localization: Nucleus, Cytoplasm. Magnification: 40X. (A) DAPI (blue) nuclear stain (B) Phalloidin Texas Red F-Actin stain (C) ATG12 Antibody (D) Composite.</p>

Immunocytochemistry/Immunofluorescence analysis using Rabbit Anti-ATG12 Polyclonal Antibody (SPC-608). Tissue: Cervical Cancer cell line (HeLa). Species: Human. Fixation: 4% Formaldehyde for 15 min at RT. Primary Antibody: Rabbit Anti-ATG12 Polyclonal Antibody (SPC-608) at 1:100 for 60 min at RT. Secondary Antibody: Goat Anti-Rabbit ATTO 488 at 1:100 for 60 min at RT. Counterstain: DAPI (blue) nuclear stain at 1:5000 for 5 min RT. Localization: Nucleus, Cytoplasm. Magnification: 40X. (A) DAPI (blue) nuclear stain (B) Phalloidin Texas Red F-Actin stain (C) ATG12 Antibody (D) Composite.

<p>Western blot analysis of Human HeLa cell lysates showing detection of ~15kDa ATG12 protein using Rabbit Anti-ATG12 Polyclonal Antibody (SPC-608). Lane 1: MW Ladder. Lane 2: Human HeLa (20 µg). Load: 20 µg. Block: 5% milk + TBST for 1 hour at RT. Primary Antibody: Rabbit Anti-ATG12 Polyclonal Antibody (SPC-608) at 1:1000 for 1 hour at RT. Secondary Antibody: Goat Anti-Rabbit: HRP at 1:2000 for 1 hour at RT. Color Development: TMB solution for 12 min at RT. Predicted/Observed Size: ~15kDa. Other Band(s): ATG12-ATG5 Complex.</p>

Western blot analysis of Human HeLa cell lysates showing detection of ~15kDa ATG12 protein using Rabbit Anti-ATG12 Polyclonal Antibody (SPC-608). Lane 1: MW Ladder. Lane 2: Human HeLa (20 µg). Load: 20 µg. Block: 5% milk + TBST for 1 hour at RT. Primary Antibody: Rabbit Anti-ATG12 Polyclonal Antibody (SPC-608) at 1:1000 for 1 hour at RT. Secondary Antibody: Goat Anti-Rabbit: HRP at 1:2000 for 1 hour at RT. Color Development: TMB solution for 12 min at RT. Predicted/Observed Size: ~15kDa. Other Band(s): ATG12-ATG5 Complex.

Product Citations (0)

Currently there are no citations for this product.

FITC (Fluorescein)

Overview:

Excellent fluorescence quantum yield
High rate of photobleaching
Good solubility in water
Broad emission spectrum
pH dependent spectra
Molecular formula: C₂₀H₁₂O₅
Molar mass: 332.3 g/mol

FITC-Fluorescent-conjugate

Optical Properties:

λ_ex = 494 nm

λ_em = 520 nm

ε_max = 7.3×10⁴

Φ_f = 0.92

τ_fl = 5.0 ns

Brightness = 67.2

Laser = 488 nm

Filter set = FITC

蚂蚁淘电商平台
ebiomall.com

公司简介

蚂蚁淘（www.ebiomall.cn）是中国大陆目前唯一的生物医疗科研用品B2B跨境交易平台，该平台由多位经验丰富的生物人和IT人负责运营。蚂蚁淘B2B模式是指客户有采购意向后在蚂蚁淘搜索全球供应信息，找到合适的产品后在蚂蚁淘下单，然后蚂蚁淘的海外买手进行跨境采购、运输到中国口岸，最后由蚂蚁淘国内团队报关运输给客户...

蚂蚁淘承诺

正品保证： 全球直采在线追溯蚂蚁淘所有产品都是自运营的，我们已经跟国外多家厂方建立品牌推广合作关系, 获得对方的支持和授权；同时客户可以通过订单详情查看到货物从厂方至客户的所有流程，确保货物的来源；正规报关，提供13%增值税发票。

及时交付： 限时必达畅选无忧蚂蚁淘的运营团队都是有着多年经验的成员，他们熟悉海外采购、仓储物流、报关等环节；同时通过在线的流程监控，蚂蚁淘的进口速度比传统企业提高了50%以上，部分产品甚至能做到7-10天到货，即蚂蚁淘的“时必达”服务。

轻松采购： 在线下单简单省事蚂蚁淘的价格是真实透明的，并且具有很大的价格优势，不需要繁杂的询价比价；报价单与合同可以直接在线生成或打印；就像在京东购物一样，您的鼠标点击几次即完成在蚂蚁淘的采购，订单详情会告诉您所有进程。

售后申请： 耐心讲解优质服务蚂蚁淘提供的产品在使用过程中如因产品质量问题有售后需求时，您可通过我的订单提交您的“申请售后”，蚂蚁淘产品顾问会第一时间为您处理，在售后服务过程中如遇到问题也可致电蚂蚁淘客服热线：4000-520-616。

超低分子量蛋白质Marker(3.320.1kDa)_蛋白marker_蛋白电泳 ...

2021-09-07

北京雷根生物技术有限公司在发布的SDS-PAGE分离胶缓冲液(4×)供应信息，浏览与SDS-PAGE分离胶缓冲液(4×)相关的产品或在搜索更多与SDS-PAGE分离胶缓冲液(4×)相关的内容。查看更多>

baicalin品牌:goldbio进口网

2021-08-31

蛋白分离胶缓冲液,4X是由上海百赛生物技术有限公司代理或销售的Amresco品牌的试剂，产品来源于美国。上海百赛生物技术有限公司是中国最权威的蛋白分离胶缓冲液,4X试剂销售服务商之一，在上海等地方销售蛋白分离胶缓冲液,4X试剂已经多年。生物在线为您提供众多企业蛋白分离胶缓冲液,4X仪器产品及图片，以便挑选到性价比高，合适的蛋白分离胶缓冲液,4X产品查看更多>

磷酸盐缓冲液（PB）的配制实验方法

2021-07-22

磷酸盐缓冲液（Phosphate Buffered Saline，简称PBS）的是常用的用于生物学研究的一个缓冲溶液。... 查看更多>

细胞培养的污染源有这几个,你造吗?_培养液

2021-09-01

上海研生实业有限公司所提供的改良磷酸盐缓冲液PSB质量可靠、规格齐全,上海研生实业有限公司不仅具有精湛的技术水平,更有良好的售后服务和优质的解决方案,欢迎您来电咨询此产品具体参数及价格等详细信息！查看更多>

美国范德比尔特R.T.Vanderbilt润滑油添加剂VANLUBE 692E ...

2018-07-16

amresco DNA测序胶及缓冲液试剂盒【1218】，amresco现货。Amresco公司来自美国，成立于 1976 年，为高质量生化试剂 / 试剂盒的生产商及供应商，产品服务于生物科研领域。用于体外诊断及医药中间体的美国 FDA 注册。amresco DNA测序胶及缓冲液试剂盒【1218】021-61806666 33779006品牌：AMRESCO数量：大量保存条件：4℃供应商：AMRESCO保质期：1年amresco DNA测查看更多>

德国Merck Dtube透析管说明书

2021-09-03

上海研生实业有限公司所提供的Citrate 柠檬酸盐缓冲液（0.01M pH6.0）质量可靠、规格齐全,上海研生实业有限公司不仅具有精湛的技术水平,更有良好的售后服务和优质的解决方案,欢迎您来电咨询此产品具体参数及价格等详细信息！查看更多>

羊抗人纤维蛋白原 (RBITC标记)_价格厂家供应商_北京寰宇科创生物科技...

2021-09-06

上海研生实业有限公司所提供的Citrate 柠檬酸盐缓冲液（1.0M pH6.0）质量可靠、规格齐全,上海研生实业有限公司不仅具有精湛的技术水平,更有良好的售后服务和优质的解决方案,欢迎您来电咨询此产品具体参数及价格等详细信息！查看更多>

生物包括动物和植物吗_高三网

2021-08-20

南京森贝伽生物科技有限公司在发布的Tris-Triton-NaCl缓冲液供应信息，浏览与Tris-Triton-NaCl缓冲液相关的产品或在搜索更多与Tris-Triton-NaCl缓冲液相关的内容。查看更多>

吉林省德商药业股份有限公司所属域名dspharm.com.cn备案详细信息

2018-07-16

amresco蛋白浓缩胶缓冲液【1218】，amresco现货。Amresco公司来自美国，成立于 1976 年，为高质量生化试剂 / 试剂盒的生产商及供应商，产品服务于生物科研领域。用于体外诊断及医药中间体的美国 FDA 注册。amresco蛋白浓缩胶缓冲液【1218】021-61806666 33779006品牌：AMRESCO数量：大量保存条件：4℃供应商：AMRESCO保质期：1年amresco蛋白浓缩胶缓冲液【1218】Cod 查看更多>

人维生素D(VD)试剂盒(ELISA)

2021-09-21

四川展峥生物科技有限公司在发布的Restore Western Blot 抗体剥离缓冲液供应信息，浏览与Restore Western Blot 抗体剥离缓冲液相关的产品或在搜索更多与Restore Western Blot 抗体剥离缓冲液相关的内容。查看更多>

Nonee的个人空间 ( ゜゜)つロ乾杯~ Bilibili

2021-09-11

南京森贝伽生物科技有限公司在发布的碳酸氢钠缓冲液供应信息，浏览与碳酸氢钠缓冲液相关的产品或在搜索更多与碳酸氢钠缓冲液相关的内容。查看更多>

羊抗牛IgGRBTIC_羊抗牛IgGRBTIC说明,羊抗牛IgGRBTIC市场报价...

2021-07-28

上海笃玛生物科技有限公司在发布的TESCA缓冲液(pH7.4,无菌)供应信息，浏览与TESCA缓冲液(pH7.4,无菌)相关的产品或在搜索更多与TESCA缓冲液(pH7.4,无菌)相关的内容。查看更多>

常见问题

蚂蚁淘所售产品均为正品吗？

蚂蚁淘的创始人兼CEO是钟定松先生，具有十年的从业经验，在业界享有良好的口碑； Ebiomall是跨境直采平台，我们直接从厂家采购，自己的团队负责国际物流和清关，中间没有第三方，蚂蚁淘承诺所售产品仅为正品，假一罚十。

下单后可以修改订单吗？

未确认状态的订单可以修改，打开“订单详情”页面，点击右上角的“修改订单”即可，若已审核确定，则订单无法修改。

商品几天可以发货？

现货产品付款审核后即可发货,大部分期货产品在3周左右即可到货,提供时必达服务的产品订单审核十天内即可发货。

订单如何取消？

如订单处于未确定状态，进入“我的订单"页面，找到要取消的订单，点击“取消订单”按钮。

可以开发票吗？

本网站所售商品都是正规清关，均开具13%正规发票，发票金额含配送费金额，另有说明的除外。

如何联系商家？

蚂蚁淘任何页面都有在线咨询功能，点击“联系客服”、“咨询”或“在线咨询”按钮，均可咨询蚂蚁淘在线客服人员，或拨打4000-520-616，除此之外客户可在联系我们页面找到更多的联系方式。

收到的商品少了/发错了怎么办？

同个订单购买多个商品可能会分为一个以上包裹发出，可能不会同时送达，建议查看订单详情是否是部分发货状态；如未收到，可联系在线客服或者致电4000-520-616。

退换货/维修需要多长时间？

一般情况下，退货处理周期为客户收到产品一个月内（以快递公司显示签收时间为准），包装规格、数量、品种不符，外观毁损、短缺或缺陷，请在收到货24小时内申请退换货；特殊商品以合同条款为准。

商品咨询

如何选择缓冲溶液?_123

sweetwater2021-07-21

做试验的时候用到很多种缓冲液，Tris,triethanolamine,HEPES,还有磷酸缓冲液，不知道这些缓冲液之间有没有大的区别，选择缓冲液的依据是什么？

如果只是为了缓冲酸碱度，是不是可以用一种缓冲液来代替所有其他的？这样做试验就方便多了。谢谢指教

缓冲溶液是什么,为啥可以维持溶液酸碱度稳定 123

知足3912017-10-02

【1】酸碱缓冲溶液：其中的一般酸碱缓冲溶液是指控制溶液酸碱度的溶液.他的作用是在此溶液中,加入少量的强酸或强碱,或者将其稍加稀释时,溶液的ph值基本上保持不变.【2】可以维持溶液酸碱度稳定的原因：主要原因是因为构成一般酸碱缓冲溶液的组分是“一元共轭酸碱”.例如“醋酸-醋酸钠”酸碱缓冲溶液.由PH的计算式：pH = p Ka +log[C酸/C碱] ,可见C酸/C碱的微小改变,其PH值,基本不变.

求大侠帮助啊,怎样确定蛋白质的酸碱性啊??? 生物科学...123

空镜2021-07-20

请问什么软件可以测蛋白质的酸碱性

【求助】Whatman的DEAE52到底用不用酸碱预处理?怎么说法不一...123

langfeng2021-07-26

Whatman的网站上说DE52（货号4057-200）是预膨胀的（Preswollen），有的中文网站上说DE52是即用型。
这就是说不用酸碱预处理吗？
Whatman的网站上没有DE52最大耐受压力，请问又经验的战友应该是多少？

Whatman的网站上：
DE32DryMicrogranularDEAECellulose
SimilarperformancecharacteristicsafterprecyclingasDE52.

DE52PreswollenMicrogranularDEAECellulose
ProbablythemostwidelyusedDEAEcelluloseintheworld;usedforbiopolymerswithlowtohighnegativecharges;exhibitsexcellentresolutionwithgoodflowrates.

附件是一本图书(MethodsinMolecularMedicine,)的章节,上面说:
WhatmanDEAE52comesalreadypreswollenandonlyneedstobetransferred
totherunningbuffer50mMTE8.

lAntibodiesUsingIonExchangeChromatography.pdf(87.06k)

缓冲溶液就是能抵抗外来酸碱影响,保持pH值绝对不变的溶液。 () ...123

linaqb134662017-10-02

缓冲溶液为什么能够低抗外来酸碱对ph的改变

一般的酸碱缓冲溶液有哪些类型,如何选择？123

2017-10-02

【酸碱缓冲溶液的类型及选择】酸碱缓冲溶液有三种类型：
1、弱酸和它的盐（如：HAc---NaAc）的水溶液组成；
2、弱碱和它的盐（如：NH3·H2O---NH4Cl）的水溶液组成；
3、多元弱酸的酸式盐及其对应的次级盐（如：NaH2PO4---Na2HPO4）的水溶液组成。
酸碱缓冲溶液的选型一般应根据具体情况进行选择。缓冲酸性可选用碱性缓冲液，缓冲酸性可采用碱性缓冲液。常用作缓冲溶液的酸类由弱酸及其共轭酸盐组合成的溶液具有缓冲作用。生化实验室常用的缓冲系主要有磷酸、柠檬酸、碳酸、醋酸、巴比妥酸、Tris（三羟甲基氨基甲烷）等系统，生化实验或研究工作中要慎重地选择缓冲体系，因为有时影响实验结果的因素并不是缓冲液的pH值，而是缓冲液中的某种离子。如硼酸盐、柠檬酸盐、磷酸盐和三羟甲基甲烷等缓冲剂都可能产生不需要的化学反应。
【酸碱缓冲溶液】由弱酸及其盐、弱碱及其盐组成的混合溶液，能在一定程度上抵消、减轻外加强酸或强碱对溶液酸碱度的影响，从而保持溶液的pH值相对稳定。这种溶液称为酸碱缓冲溶液。

PH值在多少为碱性水?123

wuzhixuan20032005-06-13

25倍电转缓冲液的ph＝8.3真的不能调吗？听师兄说一次配好液后它的ph值就必须是8.3，不能再进行加酸或加碱调节，可我配了一天也没达到这个要求，用的是18g甘氨酸和3.64g的trisbase加dd水到100ml，总是ph值到8.8左右，在配过程中可以加热吗，不然太难溶解了，

凝胶电泳缓冲液的配制123

haina1682021-07-23

我按下面方法配制电泳缓冲液：
Tris-base15.1g
甘氨酸94g
SDS5g
H2O1000ml
听人说就这样配制，PH值就会在8.3左右，都不要怎么调PH的，但不知我这样配制后PH值在6.4左右？迷惑，配制了几次还是这样。本人初次做sds-page，请前辈们指教。
另外Tris是以前师兄留下的，几年了已经，SDS也是以前的，但是没有开封，密封的很好。甘氨酸是新买进口封装的。会不会试剂过期的原因？

药典中,纯化水酸碱度能用PH计测量吗?《中国药典》2020版讨论区...123

rainbow09282021-07-25

药典上说取本品10ml，加甲基红指示液（变色范围ph4.2-6.3，红~黄）2滴不得显红色；加溴麝香草酚蓝（变色范围ph6.0-7.6，黄~蓝）5滴不得显蓝色。
是否可以理解为纯化水得PH范围为6.3-7.6？能否直接用pH计测量？谢谢!

大家一起来讨论下哈~单抗分析:不同CEX方法测定同一个单抗,酸碱性...123

threetigers2015-03-06

如题：
两个CEX方法A和B测定同一单抗，结果碱性峰比例差不多，酸性峰比例相差约7%，相应主峰也差了7%左右。
具体来说，A方法酸性峰高，主峰低，碱性峰稍微低点；B方法酸性峰低，主峰高，碱性峰稍微高点；另外也做了CIEF，结果呢和A方法更接近。
仔细比较起来，AB两个方法的峰性和数量差不多，就不知道为什么会有这么大的差异。两个方法一个用的WCX柱-磷酸缓冲液，一个用SCX柱-MES缓冲液
大家帮我分析下：
1.两个方法哪个方法更准确，是以酸性峰高的为准还是什么？为什么？
2.这显著差异是由方法造成，具体原因是什么？柱子？
3.CIEF的结果和A方法更接近，是不是可以由此证明A方法更好或者CIEF的方法更好（因为CIEF更快更方便）？
欢迎讨论~
纠正下，A方法用的是Tosoh的柱子，B方法用的是SCX柱。TOSOH的柱子是7um的填料，10cm长。SCX是10um的填料。我本人TOSOH的阳离子柱子用的很少，这次信手用用，结果发现差异很大
那我现在就考虑，在以后方法开发过程中，除了通过流动相pH和组成、梯度、柱子选择来获得样品主峰和酸碱性的最大分离，还要关注各峰比例。因为之前比较方法好坏都只看分离度，尤其是主峰和邻近峰的分离度，获得最大分离度，自然可以做到主峰尽可能纯，但从未认真比较过各峰比例。这是一个大疏忽吧！
另外，CIEF和CEX方法原理还是有点差异的，所以分的是不同的异质体，原液放行两个方法肯定是都要做的。问题就是在早期细胞株筛选和工艺开发阶段，哪个方法才是又快又准。CIEF（iCE280)一般15分钟一个样，比CEX快多了。如果CIEF测得主峰要低于CEX结果，是不是真的完全可以取代CEX呢？CEX分离出的峰远比CIEF的多！
欢迎大家继续讨论~

培养基高压蒸气灭菌后pH值的变化及其对细菌生长的影响123

mars7472005-08-25

:)
我在做一细菌不同酸碱度生长状况时,发现这些奇怪现象:pH=3的培养基灭菌(TSB液体培养基)灭菌后pH上升到到9.2!而原来pH=9.0的降到8.7(基本没多少变化),请问各位大侠,这是什么原因?

一般做不同酸碱度生长实验时,该如何才能防止pH在湿热灭菌后基本不变化?

【求助】蛋白质酸碱性对离子交换色谱填料的选择蛋白质和糖学...123

ldx74226632009-08-05

求助：我目前需用离子交换法进行蛋白质的分离和纯化，但是我不知道要纯化的蛋白质的等电点，怎么样选择柱料及洗脱缓冲液呢？如果必须知道，有没有什么简便的方法测定蛋白质的等电点呢？谢谢