Use of homologous amdS genes as selectable markers

摘要

The present invention discloses novel amdS genes from fungi previously not known to contain and amdS gene, such as Aspergillus niger and Penicillium chrysogenum. The novel amdS genes can be used as homologous selectable marker genes in the transformation of these fungi. Alternatively, the cloned amdS genes can be used to inactivate the endogenous copy of the gene in order to reduce the background in transformation experiments.