Figure 2.

Up-regulated genes encoding enzymes from the cysteine de novo biosynthesis pathway. Arrows indicate enzymes identified as up-regulated both by in silico subtraction, cDNA microarray and confirmed by northern blotting experiments. (*) enzyme identified as up-regulated by both in silico subtraction and cDNAs microarray but not assayed by northern blotting. (**) indicates an enzyme not found in the transcriptome of P. brasiliensis.