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In this work, we attempted to identify a method for the selective extraction of periplasmic endogenously expressed proteins, which is applicable at an industrial scale. For this purpose, we used an expression model that allows coexpression of two fluorescent proteins, each of which is specifically targeted to either the cytoplasm or periplasm. We assessed a number of scalable lysis methods (high‐pressure...
Secretory immunoglobulins are an important antibody class being primarily responsible for immunoprotection of mucosal surfaces. A simple, non‐chromatographic purification process for secretory immunoglobulins from caprine whey was developed. In the first process step whey was concentrated 30–40‐fold on a 500 kDa membrane, thereby increasing the purity from 3% to 15%. The second step consisted of a...
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