Isolation of Hepatitis B surface antigen from transformed yeast

Chemistry: molecular biology and microbiology – Micro-organism – tissue cell culture or enzyme using process... – Recombinant dna technique included in method of making a...

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530350, 530395, 530419, 530420, 530421, 530427, 530806, C07K 14085, C07K 130, C07K 136, C12N 1551

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054628636

ABSTRACT:
A method for recovering hepatitis B surface antigen protein from transformed yeast cells including the steps of (i) obtaining an aqueous homogenate of the yeast cells; (ii) enriching the hepatitis B surface antigen protein in the homogenate with a protein-aggregating reagent to form a precipitate which contains hepatitis B surface antigen protein; (iii) dissolving the precipitate in a buffer to form a suspension; and (iv) post-homogenizing the suspension to obtain a 10% to 50% increase in yield of the hepatitis B surface antigen protein as calculated based on a yield achieved without performing the post-homogenizing step.

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