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Investigators at Novartis have published new data on life sciences
2009 NOV 2 -- According to a study from Basel, Switzerland, "A manufacturing approach for liquid high concentration antibody formulations based on precipitation and subsequent re-dissolution was investigated. IgG1 antibody solutions were concentrated from 20 to 100 mg/mL by intermediate precipitation, with a recovery exceeding 95%, retention of the native secondary structure and binding activity as well as adequate stability."
"Quantitative, reproducible precipitation was performed using 1.45 M ammonium sulphate (pH 5.5 and 8.0), 0.67 M sodium citrate (pH 8.0) and 9% (w/v) PEG 4000 (pH 5.5 and 8.0). Scalability was confirmed from 1 to 100 mL. The concentrations...
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