Hampton GRAS 3 • GRAS 4 Screens

Hampton GRAS 3 • GRAS 4 Screens
Applications
a.GRAS reagent crystallization screen for proteins, including monoclonal antibodies, where Salt is the primary, and Polyethylene glycol the secondary reagent, sampling pH 4-9
b.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:

24 unique Salts

 

Secondary crystallization reagent:

GRAS Screen 3: PEG 300, 400, MME 550, & 600
GRAS Screen 4: PEG 1,000, MME 2,000, 3,350 & 4,000

 

Compatible with Vapor diffusion, microbatch, free interface diffusion
Reagents soluble between 4°C and 30°C

 Description
GRAS Screen™ 3 and GRAS Screen™ 4 were developed by Hampton Research for the crystallization of proteins, including monoclonal antibodies. Each of the chemicals in GRAS Screen 3 and 4 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 3 samples twenty four salts, encompassing pH 4-9 versus four low molecular weight Polyethylene glycols (300, 400, MME 550, & 600). GRAS Screen 3 is supplied in a 96 Deep Well block format and is compatible with robotic and multi-channel pipet liquid handling systems. GRAS Screen 3 is compatible with vapor diffusion, free interface diffusion, and microbatch crystallization methods. For research use only.
GRAS Screen 4 samples twenty four salts, encompassing pH 4-9 versus four medium molecular weight Polyethylene glycols (1,000, MME 2,000, 3,350 & 4,000). GRAS Screen 4 is supplied in a 96 Deep Well block format and is compatible with robotic and multi-channel pipet liquid handling systems. GRAS Screen 4 is compatible with vapor diffusion, free interface diffusion, and microbatch crystallization methods. For research use only.
 

CAT NO NAME DESCRIPTION
HR2-453 GRAS Screen 3 1 ml, Deep Well block format
HR2-454 GRAS Screen 4 1 ml, Deep Well block format

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