| D | | e4r83D2 | A: alpha arrays | X: Rubredoxin-like | H: Rubredoxin-related | T: Rubredoxin-related | F: | ECOD (v295.2) |
| D | HetR_C | e4r83D3 | A: alpha arrays | X: Membrane attack complex/perforin (MACPF) and cholesterol-dependent cytolysin (CDC) domains | H: Dimerization domain of heterocyst differentiation protein HetR | T: Dimerization domain of heterocyst differentiation protein HetR | F: HetR_C | ECOD (v295.2) |
| C | | e4r83C1 | A: alpha arrays | X: Rubredoxin-like | H: Rubredoxin-related | T: Rubredoxin-related | F: | ECOD (v295.2) |
| C | HetR_C | e4r83C2 | A: alpha arrays | X: Membrane attack complex/perforin (MACPF) and cholesterol-dependent cytolysin (CDC) domains | H: Dimerization domain of heterocyst differentiation protein HetR | T: Dimerization domain of heterocyst differentiation protein HetR | F: HetR_C | ECOD (v295.2) |
| B | | e4r83B1 | A: alpha arrays | X: Rubredoxin-like | H: Rubredoxin-related | T: Rubredoxin-related | F: | ECOD (v295.2) |
| B | HetR_C | e4r83B2 | A: alpha arrays | X: Membrane attack complex/perforin (MACPF) and cholesterol-dependent cytolysin (CDC) domains | H: Dimerization domain of heterocyst differentiation protein HetR | T: Dimerization domain of heterocyst differentiation protein HetR | F: HetR_C | ECOD (v295.2) |
| A | K319L-like_PKD | e4r83A1 | A: alpha arrays | X: Immunoglobulin-like beta-sandwich | H: Immunoglobulin-related | T: PEBP-like | F: K319L-like_PKD | ECOD (v295.2) |
| A | Sacchrp_dh_C | e4r83A2 | A: alpha arrays | X: CBS-domain | H: CBS-domain | T: Glyceraldehyde-3-phosphate dehydrogenase-like, C-terminal domain | F: Sacchrp_dh_C | ECOD (v295.2) |