Hampton Polyethylene glycol 4,000

Description
Polyethylene glycol 4,000
Synonym: PEG 4,000
H(OCH₂CH₂)_nOH
M_r 3,500-4,500
CAS Number [25322-68-3]
EC Number 500-038-2
Merck 14,7568
RTECS TQ3500000
MDL Number MFCD00081839
PubChem Substance ID 24890217
Melting point (Starting Material) 58.0-61.0°C
Aldehyde None detected
Peroxide None detected

HR2-529 Measured pH range: 6.9 – 9.5 at 25°C
HR2-529 Measured Conductivity Range: 35.3 – 46.9 µS/cm at 25°C
HR2-529 Measured Refractive Index Range: 1.40172 – 1.40279 at 20°C

Hampton Solubility & Stability Screen

Solubility & Stability Screen（溶解度和稳定性的屏幕）

应用：溶解性和稳定性屏幕的设计，以协助识别解决方案的条件，促进蛋白质的溶解性和稳定性，并尽量减少蛋白质沉淀。

Solubility & Stability Screen

Solubility & Stability Screen HR2-072

Applications

Features

Methodologies

Description

Solubility & Stability Screen is designed to assist in the identification of solution conditions which promote protein solubility and stability, and minimize protein precipitation. Solubility & Stability Screen is a solubility screen, a stability screen, and may also be used as an additive screen in the presence of a crystallization reagent.

The Hampton Research Solubility and Stability Screen can evaluate protein solubility, stability and crystallization in the presence of 94 different chemical additives sampling 17 different classes of reagents plus two controls.

Protein solubility and stability are universally required in a wide range of applications, including general biochemical studies, the preparation of proteins in pharmaceuticals, structural biology and crystallization.1-11The preparation of a concentrated, soluble and stable protein sample can often be a difficult task as proteins often aggregate, precipitate or denature.

Thermofluor (also known as Differential Scanning Fluorimetry, DSF and Protein Thermal Shift) provides a rapid, convenient and effective means of identifying subsaturating solution conditions that may also correlate with protein heterogeneity and poor crystallization outcomes.12

Protein solubility and stability is affected by many different chemical factors including pH, buffer type, chemical additives and excipients. pH and buffer type are dominant protein solubility and stability variables and can be evaluated and optimized using the Hampton Research Slice pH kit HR2-070. Slice pH evaluates protein solubility, stability and crystallization versus 20 different buffers over the pH range 3.5-9.6. Chemical additives influencing protein solubility and stability can be evaluated using the Solubility & Stability Screen.

It is widely accepted that protein solubility and stability can be increased by the use of chemical additives.5,15Seventeen classes of reagents are sampled by the Solubility & Stability Screen and each of these classes has been reported as important in improving sample solubility and stability.2-11

The Solubility & Stability Screen is a set of 94 high purity reagents formulated in high purity water (NCCLS/ASTM Type 1+) at 25°C and are 0.22 micron sterile filtered. The 94 solubility and stability reagents are formulated at 2 to 10 times their recommended working concentration. The remaining two reagents are water and a negative (TCA) control. A water control demonstrates the effect of diluting sample as well as sample buffer concentration. TCA, the negative control, demonstrates total sample precipitation, loss of sample solubility and loss of sample stability. The effects of the Solubility & Stability reagents can be compared with this negative control to assist in the identification of reagents promoting sample solubility and stability. 500 microliters of each reagent is supplied in a sterile 96 well polypropylene Deep Well block. The Solubility & Stability Screen reagents are compatible with the sitting or hanging drop vapor diffusion, microbatch, free interface diffusion, sandwich drop vapor diffusion, and dialysis crystallization methods utilizing water soluble reagents.

Hampton 银弹 Silver Bullets

Hampton 水晶透明密封带Crystal Clear Sealing Tape

3 inch, 1.88 inch, 1.88 inch with dispenser, 0.75 inch with dispenser (left to right)

0.75 inch Crystal Clear Sealing Tape

Applications  应用
Sealing tape used to seal sitting drop crystallization experiments

Description

These optically clear tapes are compatible with protein crystallization reagents. The polypropylene Crystal Clear Sealing Tapes use acrylic solvent based adhesives which are compatible with aqueous crystallization reagents.

Catalog number HR3-511 is a 1.88 inch (48 mm) wide, 3 mil tape on a 43.7 yard (40 M) roll with a 1.5 inch core and is supplied with a green dispenser / cutter.Catalog number HR4-511 is a 1.88 inch wide, 3 mil tape on a 60 yard roll with a 3 inch core and no dispenser / cutter.Two strips of the HR3-511 or HR4-511 will seal a Corning, Cryschem, CrystalClear Strip, Greiner, Intelliplate, Linbro, Swissci (MRC), VDX and VDXm plate.Catalog number HR4-506 is a 3 inch wide, 3 mil tape on a 54.86 yard roll with a 3 inch core and no dispenser / cutter.One strip of the HR4-506 will seal a Corning, Cryschem M, CrystalClear Strip, Greiner, Intelliplate, Swissci (MRC) and VDXm plate.Crystal Clear Mini Sealing Tape HR4-508 is a 0.75 inch (19 mm) wide, 3 mil tape on a 650 inch (16.5 M) roll and is supplied with a clear dispenser / cutter. The tape is useful for resealing or patching wells after mounting crystals. The tape is also wide enough to seal a single row of a Cryschem S or Cryschem M plate.See chart for tape and plate compatibility.

Hampton蛋白结晶产品目录

Hampton 蛋白结晶优化试剂 Optimization Screens

1、Solubility & Stability Screen  蛋白特异性试剂优化溶解性和稳定性

Protein specific agents for optimization of solubility & stability  

2、Solubility & Stability Screen 2   离子缓冲液

Buffer, pH & ionic strength screen for optimization of solubility & stability

3、Slice pH    PH缓冲液

pH & buffer screen for optimization of crystals or sample solubility & stability

4、Additive Screen  96孔板添加剂试剂盒

96 compound screen for optimization of crystal size & quality

5、Silver Bullets • Silver Bullets Bio

Small molecule additive screen for optimization of crystal size & quality

6、Detergent Screen

Detergent screen for optimization of crystals or sample solubility & stability

7、Ionic Liquid Screen

Ionic liquid additive screen for optimization of crystal size & quality

8、StockOptions Buffer Kits

Titrated buffer sets for optimization of crystals or sample solubility & stability

9、StockOptions Polymer

n of crystal size & quality

10、StockOptions Salt

Salt reagent kit for optimization of crystal size & qualit

11、Polymer reagent kit for optimizatioy

Proti-Ace

In situ proteolysis kit protein for crystallization screening & optimization

12、Reductive Alkylation

Reductive alkylation kit for crystallization screening & optimization

13、Silica Hydrogel Kit

pH neutral silica hydrogel matrix crystallization

14、Low Melting Agarose

Agarose gel matrix crystallization

15、CryoPro

Water soluble cryoprotectant reagent set

16、Heavy Atom Screens

Heavy atom kits for multiple isomorphous replacement

17、I3C Phasing Kit

Produce heavy atom derivative of biological macromolecules for phasing

Hampton GRAS 1 • GRAS 2 Screens

stallization screen for proteins, including monoclonal antibodies, where Polyethylene glycol is the primary, and Salt the secondary reagent, sampling pH 4-9 Identify GRAS based reagents that promote crystallization of biotherapeutics for bioprocess, bioformulation, and continuous flow manufacturing applications Features Developed at Hampton Research Generally Recognized As Safe reagent formulation Samples pH 4.0 – 9.0 without an added buffer Primary crystallization reagent: GRAS Screen 1: PEG 300, 400, MME 550, & 600 GRAS Screen 2: PEG 1,000, MME 2,000, 3,350 & 4,000 Secondary crystallization reagent: 24 unique salts Compatible with Vapor diffusion, microbatch, free interface diffusion Reagents soluble between 4°C and 30°C Description GRAS Screen™ 1 and GRAS Screen™ 2 were developed by Hampton Research for the crystallization of proteins, including monoclonal antibodies. Each of the chemicals in GRAS Screen 1 and 2 have been used under one or more of the following categories. As (1) a Generally Recognized As Safe (GRAS) substance, (2) a pharmaceutical excipient, (3) a normal physiological constituent, (4) a metabolic byproduct, and/or (5) a Everything Added to Food in the United States (EAFUS) substance. GRAS Screen 1 samples four low molecular weight Polyethylene glycols (300, 400, MME 550, and 600) versus twenty-four salts, encompassing pH 4-9. GRAS Screen 1 is supplied in a 96 Deep Well block format and is compatible with robotic and multi-channel pipet liquid handling systems. GRAS Screen 1 is compatible with vapor diffusion, free interface diffusion, and microbatch crystallization methods. For research use only. GRAS Screen 2 samples four medium molecular weight Polyethylene glycols (1,000, MME 2,000, 3,350, & 4,000) versus twenty-four salts, encompassing pH 4-9. GRAS Screen 2 is supplied in a 96 Deep Well block format and is compatible with robotic and multi-channel pipet liquid handling systems. GRAS Screen 2 is compatible with vapor diffusion, free interface diffusion, and microbatch crystallization methods. For research use only.

ITEMS CAT NO NAME DESCRIPTION HR2-451 GRAS Screen 1 1 ml, Deep Well block format Price Quantity $245.00 CAT NO NAME DESCRIPTION HR2-452 GRAS Screen 2 1 ml, Deep Well block format Price Quantity $245.00