HBsAg is produced in recombinant yeast cells. A portion of the hepatitis B virus gene, coding for HBsAg, is cloned into yeast, and the vaccine for hepatitis B is produced from cultures of this recombinant yeast strain according to methods developed in the Merck Research Laboratories. The antigen is harvested and purified from fermentation cultures of a recombinant strain of the yeast Saccharomyces cerevisiae containing the gene for the adw subtype of HBsAg. The fermentation process involves growth of Saccharomyces cerevisiae on a complex fermentation medium which consists of an extract of yeast, soy peptone, dextrose, amino acids and mineral salts.feeling like you might pass out;What are the classes of available antidepressantsCheap Protonix 40mg
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Call your doctor at once if you have a serious side effect such as:If you miss a dose of Fexofenadine: Take it as soon as you remember. If it is almost time for your next dose of Fexofenadine, skip the one you missed and go back to your regular schedule. Do not take 2 doses of Fexofenadine at once.
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