Substrate strand       Enzyme strand    Sequential numbering Canonical numbering Sequential numbering Canonical numbering 5' 5' 5' 5' G-1 G-16.5 GDP-1 GDP-2.10 G-2 G-16.4 G-2 G-2.9 C-3 C-16.3 A-3 A-2.8 G-4 G-16.2 U-4 U-2.7 U-5 U-16.1 G-5 G-B1.1 C-6 C-17 U-6 U-B1.2 C-7 C-1.1 A-7 A-B1.3 U-8 U-1.2 C-8 C-B1.4 G-9 G-1.3 U-9 U-2.6 G-10 G-1.4 A-10 U-2.5 U-11 U-1.5 C-11 C-2.4 A-12 A-1.6 C-12 C-2.3 U-13 U-B1.5 A-13 G-2.2 C-14 C-B1.6 G-14 G-2.1 C-15 C-B1.7 C-15 C-3 A-16 A-B1.8 U-16 U-4 A-17 A-1.7 G-17 G-5 U-18 U-1.8 A-18 A-6 C-19 C-1.9 U-19 U-7 dC-20 dC-1.10 G-20 G-8 3' 3' A-21 A-9 G-22 G-10.1 U-23 U-10.2 C-24 C-10.3 C-25 C-10.4 C-26 C-L2.1 A-27 A-L2.2 A-28 A-L2.3 A-29 A-L2.4 U-30 U-L2.5 A-31 A-L2.6 G-32 G-11.4 G-33 G-11.3 A-34 A-11.2 C-35 C-11.1 G-36 G-12 A-37 A-13 A-38 A-14 A-39 A-15.1 C-40 C-15.2 G-41 G-15.3 C-42 C-15.4 C-43 C-15.5 3' 3' Link to a PDF of just the table that is suitable for printing.

^† The sequential numbering scheme is used in the PDB file to comply with the universally accepted standards of the Protein Data Bank, and ensures that crystallographic and molecular display programs will behave in an expected manner.

^‡ The canonical numbering scheme is that proposed in
Hertel, K.J. et al., Numbering System for the Hammerhead,
Nucleic Acids Res.  20: 12 (1992).