"Commercial scale" refers to gram scale production of a sialic acid in a single reaction. In preferred embodiments, commercial scale refers to production of greater than about 50, 75, 80, 90 or 100, 125, 150, 175, or 200 grams. If you liked this article and you would certainly like to obtain even more info concerning Supplier of sialic acid powder for pharmaceutical Ingredients kindly visit our web page. An expression cassette can be constructed for production of more than one protein. Transcription termination signals, enhancers, and other nucleic acid sequences that influence gene expression, can also be included in an expression cassette. For cells, saccharides, nucleic acids, and polypeptides of the invention, the term "isolated" refers to material that is substantially or essentially free from components which normally accompany the material as found in its native state.