The expression vector was linearized and transformed protoplasts of Aspergillus niger strain An1. Hygromycin-resistant transformants were generated and the integration of xylanase gene was confirmed by genomic Southern blotting analysis.

• 将该表达载体线性化后转化果胶酶产生菌黑曲霉菌株An1的原生质体。 对抗潮霉素黑曲霉转化子进行基因组Southern杂交分析结果表明,木聚糖酶基因已整合到受体基因组中。