默克西格玛去污剂/离子去污剂/非离子去污剂/两性离子去污剂

离子去污剂

离子除垢剂通常含有阴离子或阳离子头部基团及一个净电荷。其疏水尾部不是十二烷基硫酸钠(SDS)和十六烷基三甲基溴化铵(CTAB)等可见的直链烃,就是胆汁酸盐等包含的刚性甾体基团。离子除垢剂溶解膜蛋白非常有效,但基本都会导致一定程度的变性。胆汁酸盐是一种阴离子除垢剂,其主链由刚性甾体基团组成,例如胆酸钠盐和脱氧胆酸钠盐等。这类分子的平面结构使其具有一个极性面和一个非极性面,因此,其CMC较高,胶束较小,易于通过透析去除。

非离子去污剂

非离子除垢剂含不带电的亲水头部基团,该基团由BRIJR和TRITON?等除垢剂中的聚氧乙烯部分或辛基葡糖苷和十二烷基麦芽糖苷等中的糖苷基团组成。非离子除垢剂会破坏脂质-脂质和脂质-蛋白互作,但不会破坏蛋白-蛋白的互作,所以是公认的非变性除垢剂,因此广泛应用于分离生物活性形式的膜蛋白。另外,与离子除垢剂不同,非离子除垢剂的胶束尺寸受盐的影响很小。

两性离子去污剂

两性离子除垢剂兼具离子和非离子除垢剂的特性。与非离子除垢剂一样,两性离子除垢剂不具有净电荷,缺乏导电性和电泳迁移率,且不与离子交换树脂结合。因此是离子交换层析、电泳和等电聚焦中常用的非离子除垢剂的替代物。然而,像离子洗涤剂一样,它们能有效地打破蛋白质与蛋白质之间相互作用。另外,甾体类两性离子除垢剂(如CHAPS)相比直链两性离子除垢剂(如十二烷基二甲基二氧化胺)变性能力通常更弱。

P1379

TWEEN ? 20, viscous liquid

X100

Triton? X-100, laboratory grade

L3771

十二烷基硫酸钠, BioReagent, suitable for electrophoresis, for molecular biology, ≥98.5% (GC)

T8787

Triton? X-100, for molecular biology

P9416

TWEEN ? 20, for molecular biology, viscous liquid

P1754

TWEEN ? 80, viscous liquid

P7949

TWEEN ? 20, BioXtra, viscous liquid

PVP40

聚乙烯吡咯烷酮, average mol wt 40,000

D6750

脱氧胆酸钠, ≥97% (titration)

L4509

十二烷基硫酸钠, ReagentPlus?, ≥98.5% (GC)

436143

十二烷基硫酸钠, ACS reagent, ≥99.0%

I6758

IPTG, ≥99% (TLC), ≤0.1% Dioxane

T9284

Triton? X-100, BioXtra

P2443

Pluronic? F-127, powder, BioReagent, suitable for cell culture

93443

Triton? X-100 溶液, BioUltra, for molecular biology, ~10% in H2O

H5882

溴化十六烷基三甲铵, ≥98%

71736

十二烷基硫酸钠 溶液, BioUltra, for molecular biology, 10% in H2O

I8896

IGEPAL? CA-630, for molecular biology

A6426

消泡剂 204, mixture of organic polyether dispersions

O8380

1-辛烷磺酸 钠盐, ≥98%

I3021

IGEPAL? CA-630, viscous liquid

H2766

1-庚烷磺酸钠

H6269

溴化十六烷基三甲铵, for molecular biology, ≥99%

P2287

TWEEN ? 20, viscous liquid, suitable for cell culture

P9769

十乙二醇单十二烷基醚, nonionic surfactant

D141

毛地黄皂苷, Used as non-ionic detergent

75746

十二烷基硫酸钠, ≥99.0% (GC), dust-free pellets

P4780

TWEEN ? 80, suitable for cell culture, suitable for insect cell culture, viscous liquid

88315

Thesit?, for membrane research

59924

聚山梨酯80, tested according to Ph. Eur.

89510

聚(乙二醇), BioUltra, 8,000

P5556

Poloxamer 188 溶液, 10%, sterile-filtered, BioReagent, suitable for insect cell culture

G4376

L -氧化谷胱甘肽, ≥98% (HPLC)

C5135

Kolliphor? EL, pH range 6.0-8.0

P8136

聚乙烯醇, 87-90% hydrolyzed, average mol wt 30,000-70,000

12060

苯扎氯铵, ≥95.0% (T)

C3023

CHAPS水合物, ≥98% (HPLC)

T7505

四甲基氢氧化铵 五水合物, ≥97%

H26456

二乙二醇, ReagentPlus?, 99%

59920C

EX-CELL?止泡剂, gamma irradiated

71725

十二烷基硫酸钠, BioUltra, for molecular biology, ≥99.0% (GC)

30970

脱氧胆酸钠, BioXtra, ≥98.0% (dry matter, NT)

H5269

己烷磺酸钠, ≥98% (elemental analysis)

K4894

Kolliphor? HS 188, solid

42966

Kolliphor? HS 15

P5413

聚(乙二醇), for molecular biology, average mol wt 8,000

S6760

Span? 80, nonionic surfactant

74882

1-辛烷磺酸钠 一水合物, suitable for ion pair chromatography, LiChropur?, ≥99.0% (T)

A5757

消泡剂 B 乳液, aqueous-silicone emulsion

B4184

Brij? L23 溶液, 30 % (w/v) in H2O

D8638

十二烷基三甲基溴化铵, ≥98%

40236

十二烷基二甲基氧化胺 溶液, ~30% in H2O

47036

皂素, for molecular biology, used as non-ionic surfactant

X100RS

Triton? X-100(还原型)

P8074

TWEEN ? 80, BioXtra, viscous liquid

L5750

十二烷基硫酸钠, 92.5-100.5% based on total alkyl sulfate content basis

A8011

消泡剂C乳液, aqueous-silicone emulsion

X114

Triton? X-114, laboratory grade

L6026

十二烷基硫酸钠, BioXtra, ≥99.0% (GC)

B8879

苄索氯铵, ≥97% (titration), ≥98% (HPLC)

05030

十二烷基硫酸钠 溶液, BioUltra, for molecular biology, 20% in H2O

T4009

牛磺胆酸 钠盐 水合物, ≥95% (HPLC)

T0875

牛磺脱氧胆酸钠 水合物, ≥95% (HPLC)

L9150

N -月桂酰肌氨酸 钠盐, detergent for use in cell lysis

P3015

聚(乙二醇), average mol wt 200

A8311

消泡剂 204, aqueous emulsion for bacterial and mammalian systems

15S9

TERGITOL烷氧基聚乙烯氢氧基乙醇(非离子表面活性剂)?, Type 15-S-9

03394

聚(乙二醇), tested according to Ph. Eur., 6,000

30326

EMPIGEN? BB去污剂, ~30% active substance

86339

牛胆酸钠 水合物, ≥97.0% (TLC)

84510

皂素, used as non-ionic surfactant

G7132

甘胆酸钠 水合物, ≥95% (TLC)

51832

1-庚烷磺酸钠 一水合物, suitable for ion pair chromatography, LiChropur?, ≥99.0% (T)

52862

1-己烷磺酸钠 一水合物, suitable for ion pair chromatography, LiChropur?, ≥99.0% (T)

10783641001

聚乙二醇1500, Mr ~1500, pkg of 10 × 4 mL, solution

L5125

N -月桂酰肌氨酸 钠盐, ≥94%

H9151

溴化十六烷基三甲铵, BioXtra, ≥99%

15759

Kolliphor? P 188

G0759

甘氨鹅脱氧胆酸钠

16758

泊洛沙姆407, purified, non-ionic