In an article published online yesterday in PNAS, researchers at Technical University of Denmark show proof of principle work that used a gene chip to conduct comparative transcriptomics across three species of filamentous fungi. Comparing the Aspergillus nidulans, Aspergillus niger, and Aspergillus oryzae genomes using a chip they developed, they found 23 genes that were conserved across Aspergillus, including the xylose transcriptional