| A | H_PPase | e4rapA2 | A: alpha arrays | X: jelly-roll | H: Double-stranded beta-helix | T: Double-stranded beta-helix | F: H_PPase | ECOD (v295.2) |
| A | HetR_C | e4rapA3 | 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 | H_PPase | e4rapB2 | A: alpha arrays | X: jelly-roll | H: Double-stranded beta-helix | T: Double-stranded beta-helix | F: H_PPase | ECOD (v295.2) |
| B | HetR_C | e4rapB1 | 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 | H_PPase | e4rapC2 | A: alpha arrays | X: jelly-roll | H: Double-stranded beta-helix | T: Double-stranded beta-helix | F: H_PPase | ECOD (v295.2) |
| C | HetR_C | e4rapC1 | 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) |
| D | H_PPase | e4rapD2 | A: alpha arrays | X: jelly-roll | H: Double-stranded beta-helix | T: Double-stranded beta-helix | F: H_PPase | ECOD (v295.2) |
| D | HetR_C | e4rapD1 | 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) |
| E | TibC_1st | e4rapE1 | A: alpha arrays | X: Immunoglobulin-like beta-sandwich | H: Immunoglobulin-related | T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like | F: TibC_1st | ECOD (v295.2) |
| E | Sacchrp_dh_C | e4rapE2 | 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) |
| F | H_PPase | e4rapF2 | A: alpha arrays | X: jelly-roll | H: Double-stranded beta-helix | T: Double-stranded beta-helix | F: H_PPase | ECOD (v295.2) |
| F | HetR_C | e4rapF3 | 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) |
| G | H_PPase | e4rapG2 | A: alpha arrays | X: jelly-roll | H: Double-stranded beta-helix | T: Double-stranded beta-helix | F: H_PPase | ECOD (v295.2) |
| G | HetR_C | e4rapG3 | 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) |
| H | H_PPase | e4rapH2 | A: alpha arrays | X: jelly-roll | H: Double-stranded beta-helix | T: Double-stranded beta-helix | F: H_PPase | ECOD (v295.2) |
| H | HetR_C | e4rapH1 | 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) |
| I | H_PPase | e4rapI2 | A: alpha arrays | X: jelly-roll | H: Double-stranded beta-helix | T: Double-stranded beta-helix | F: H_PPase | ECOD (v295.2) |
| I | HetR_C | e4rapI1 | 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) |
| J | H_PPase | e4rapJ2 | A: alpha arrays | X: jelly-roll | H: Double-stranded beta-helix | T: Double-stranded beta-helix | F: H_PPase | ECOD (v295.2) |
| J | HetR_C | e4rapJ3 | 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) |
| K | H_PPase | e4rapK2 | A: alpha arrays | X: jelly-roll | H: Double-stranded beta-helix | T: Double-stranded beta-helix | F: H_PPase | ECOD (v295.2) |
| K | HetR_C | e4rapK1 | 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) |
| L | H_PPase | e4rapL2 | A: alpha arrays | X: jelly-roll | H: Double-stranded beta-helix | T: Double-stranded beta-helix | F: H_PPase | ECOD (v295.2) |
| L | HetR_C | e4rapL1 | 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) |