The article discusses how fungi like Aspergillus nidulans and Neurospora crassa use a simple pathway involving two enzymes to convert nitrate into ammonia. This process is regulated by ammonia, which suppresses the pathway's activity. The researchers found that while A. nidulans is better understood genetically, N. crassa has been more extensively studied in terms of enzyme activity. This study provides a comprehensive understanding of nitrate assimilation in fungi.