| 摘要 |
Provided are synthetic genes encoding a protein normally expressed in mammalian cells wherein at least 10% of the non-preferred or less preferred codons in the natural gene encoding said mammalian protein have been replaced by a preferred codon encoding the same amino acid. Methods for preparing such synthetic genes, comprising identifying non-preferred and less preferred codons in the natural gene encoding said protein and replacing at least 10% of said non-preferred and less preferred codons with a preferred codon encoding the same amino acid as the replaced codon are also provided. Preferred codons may be gcc, cgc, aac, gac, tgc, cag, ggc, cac, atc, ctg, aag, ccc, ttc, agc, acc, tac, and gtg, less preferred codons may be ggg, att, ctc, tcc, and gtc, and non-preferred codons may be all codons other than the preferred codons and the less preferred codons.
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