| 摘要 |
<p>The invention relates to an expression vector for an animal cell comprising, (a) a first transcription unit with, (i) a first promoter, (ii) a first gene to be expressed and, (iii) a first selection gene, (b) a second transcription unit with, (iv) a second promoter, (v) a second gene to be expressed and (vi) a second selection gene, (c) wherein said first and second selection genes differ and (d) wherein an internal ribosome binding entry site (IRES) is located between at least one of said genes to be expressed and said selection genes.</p> |
