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Chemical engineers discover filtration system to help biotech industry

Chemical engineers at New Jersey Institute of Technology (NJIT) have developed a new filtration system to enable scientists and engineers to separate and purify two different kinds of proteins having relatively close molecular weight. Until now, doing such separations with membrane filtration was impossible. This research was reported in the June 20, 2004 issue of Biotechnology and Bioengineering.

"This is good news," said Kamalesh K. Sirkar, PhD, distinguished professor of chemical engineering and the project's lead researcher. "To separate the good from the bad proteins is an important engineering breakthrough. We believe that pharmaceutical companies will immediately be able to put our research to work."

Before this invention, proteins had to differ five to six times in their molecular weight, before a scientist or engineer could separate them using a process called ultra-filtration.

"Now using a new kind of membrane that we invented at NJIT, the proteins can have almost the same molecular weight," said Sirkar. The process also will be more cost-effective because the machines can run on a continuous basis.

"The reason we think this process will be important to the industry is because purification of protein is important to its end use," said Sirkar. Impure proteins can't be used in any biopharmaceutical applications. However, when scientists in the past have gone to separate proteins and remove impurities by chromatography, costs have escalated.

NJIT has funded this research to date. The next step is to seek outside funding because more work needs to be done. "We know the process will work with a mixture of two proteins. But, Sirkar speculated, will it work if the mixtures contain three or four proteins? More questions include: can it be used on viruses or endotoxins the outer coating of a particular type of bacteria? Will the process work with non-biological macromolecules such as dextran?
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Contact: Sheryl Weinstein or Roslyn Roberts
roslyn.roberts@njit.edu
973-596-3433
New Jersey Institute of Technology
19-Aug-2004


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