abstract |
Norleucine incorporation into recombinant gene products may be inhibited by culturing the cells expressing the gene products in media comprising a high level of leucine and/or methionine, or by expressing the gene products in a leu mutant. Norleucine incorporation in recombinant gene products may be promoted by culturing the cells expressing the gene products in media comprising norleucine or deficient in leucine and/or methionine. For example, norleucine analogs of IL-2, GCSF, gamma -interferon and alpha -consensus interferon may be produced in this way. |