Abstract: The present invention describes a method for producing an antibody in Pichia pastoris, such as by fed-batch fermentation. The method may include a strategy of increasing the ethanol concentration to 18-22 g/L and then maintaining the ethanol level at 5-17 g/L to stabilize the cell mass and enhance the production rate of the antibody. The method may also include the addition of 2.0-5.0 g/L of hydroxyurea during the fermentation process to sustain a constant cell density and enhance the whole broth titer of the antibody. The method may further include a respiratory quotient control for monitoring the ethanol profile and to improve the quality of the antibody by, for example, eliminating clipping of the heavy chain.

Abstract: The present invention describes methods and processes for the production of proteins by animal cell or mammalian cell culture. In one aspect, the methods comprise the growth of cells in a growth factor/protein/peptide free medium. In another aspect, the methods comprise the addition of growth factors during the production phase. The methods sustain a high viability of the cultured cells, and can yield an increased end titer of protein product, and a high quality of protein product.

Abstract: The present invention describes methods and processes for the production of proteins, particularly glycoproteins, by animal cell or mammalian cell culture, preferably, but not limited to, fed-batch cell cultures. In one aspect, the methods comprise the addition of glucocorticoid compound during the culturing period. The addition of glucocorticoid compound sustain a high viability of the cultured cells, and can yield an increased end titer of protein product, and a high quality of protein product, as determined, e.g., by sialic acid content of the produced protein.