Analysis of genes induced when N. crassa is grown on cellulose. (A) Functional category analysis of genes in the Avicel regulon . (B) Venn diagram for the cellobiose/Avicel and CLR regulons. Genes were divided into the following categories: blue: cellobiose induction, purple: CLR mediated or dependent, white: CLR independent, grey: metabolic response to cellobiose. *21 gene set includes the three β-glucosidase genes which were not included in the cellobiose analysis . Complete data set is available as Additional file 1.