- A: alpha arrays
- X: Coronavirus main proteinase (3Cl-pro, putative coronavirus nsp2) C-terminal domain
- H: Coronavirus main proteinase (3Cl-pro, putative coronavirus nsp2) C-terminal domain
- T: Coronavirus main proteinase (3Cl-pro, putative coronavirus nsp2) C-terminal domain
- F: Peptidase_C30