Fig. 1: RNA components of RNase MRP and RNase P.
From: Cryo-EM structure of catalytic ribonucleoprotein complex RNase MRP

The catalytic (C-) domains of the two related enzymes are similar both in their secondary structures and in their folds, whereas the specificity (S-) domains are distinct. a, b Secondary structure diagrams of the RNase MRP and RNase P RNAs, respectively. c, d Folding of the RNase MRP and RNase P21 RNAs, respectively, color coded as in (a, b).