CYP51A1 and infection: For example, fungal cytochrome P450 lanosterol C‐14α‐demethylase (CYP51) genes are vital for ergosterol biosynthesis and infection, and transgenic Arabidopsis and barley expressing a double‐stranded RNA targeting all three fungal CYP51 genes exhibited complete immunity to Fusarium species (Koch et al., 2013).