Table 4 Gene expression heat map of 36 putative MFS sugar transporters in F. fomentarius under 27 different cultivation conditions highlighting the difference between predicted transporters that are constitutively expressed and weakly expressed/silent transporter-encoding genes. Phylogeny-based substrate predictions are shown in the first column as before (Table 2), JGI protein IDs in the second. Gene expression levels are depicted as log10 DeSeq normalised raw counts in the heat map with white = 0 and dark green = 10. Expression of actA is shown in the last row of the table