Figure 2. Relative mRNA levels of TRP and Piezo channels in the optic nerve head of C57BL/6 mice (n=6). Expression of 15 transient receptor potential (TRP; six TRPC, five TRPM, two TRPV, two TRPP) and two Piezo genes were determined with quantitative real-time PCR. Data represent fold differences relative to a control gene in the same subfamily: The control genes are TRPC2 for TRPC (A), TRPM6 for TRPM (B), TRPV2 for TRPV (C), TRPP1 for TRPP (D), and Piezo1 for Piezo (E). Dashed lines represent the mean expression of the control genes.