| 摘要 |
<p>Preparation of a heterologous protein (I) comprises preparing yeast-type host cells, which in addition to their endogenous, homologous DNA sequences encoding a first calnexin, also comprise additional recombinant DNA sequence encoding (I), and additional recombinant DNA sequence encoding at least one second calnexin; inducing the host cells to express (I) and to overexpress calnexin; inducing the host cells to secrete (I); and isolating the secreted (I). Preparation of a protein comprises : (a) preparing yeast-type host cells, which in addition to their one or more endogenous, homologous DNA sequences encoding a first calnexin, also comprise at least one additional recombinant DNA sequence encoding the protein, and at least one additional recombinant DNA sequence encoding at least one second calnexin, and where the protein is a heterologous secretable protein; (b) inducing the host cells to express the heterologous protein using the sequence encoding the protein and to overexpress calnexin using the sequence encoding the second calnexin; (c) inducing the host cell to secrete the heterologous protein; and (d) isolating the secreted heterologous protein.</p> |
