This volume focuses on filamentous fungi and highlights the advances of the past decade, both in methodology and in the understanding of genomic organization and regulation of gene and pathway expression. The approaches and techniques of molecular biology enable us to ask and answer fundamental questions about many aspects of fungal biology, and open the way to the directed manipulation of fungal genetics. Moreover, this book describes the development and advancement of fungal genes and the ways in which these are being exploited in species of economic importance either in biotechnology or in biochemistry.