We carried out transcriptional analyses of gtmA as well as of the genes gliP (encoding a peptide synthase), gliT (encoding gliotoxin oxidoreductase), gliF (encoding a cytochrome p450 monooxygenase), and gliM (encoding an O-methyltransferase) functioning in the GT biosynthesis pathway on days 1 and 3 post-infection. The gene discussed is CYP20A1; the disease is infection.