RNase MRP RNA secondary structure analysis. A. The secondary structure of G. intestinalis RNase MRP RNA. B. The secondary structure of T. vaginalis RNase MRP RNA. C. Analysis of the P3 helix. The P3 helix is shorter and lacks the internal loop but is comparable with what is found in the G. intestinalis RNase P RNA. Trichomonas also has a conserved region shared between the P3 helices of RNase P and RNase MRP RNA.