| X | Thymidylat_synt | e4toeX1 | A: alpha bundles | X: Four-helical up-and-down bundle | H: Thymidylate synthase/dCMP hydroxymethylase | T: Thymidylate synthase/dCMP hydroxymethylase | F: Thymidylat_synt | ECOD (develop294) |
| W | Thymidylat_synt | e4toeW1 | A: alpha bundles | X: Four-helical up-and-down bundle | H: Thymidylate synthase/dCMP hydroxymethylase | T: Thymidylate synthase/dCMP hydroxymethylase | F: Thymidylat_synt | ECOD (develop294) |
| V | Thymidylat_synt | e4toeV1 | A: alpha bundles | X: Four-helical up-and-down bundle | H: Thymidylate synthase/dCMP hydroxymethylase | T: Thymidylate synthase/dCMP hydroxymethylase | F: Thymidylat_synt | ECOD (develop294) |
| U | Thymidylat_synt | e4toeU1 | A: alpha bundles | X: Four-helical up-and-down bundle | H: Thymidylate synthase/dCMP hydroxymethylase | T: Thymidylate synthase/dCMP hydroxymethylase | F: Thymidylat_synt | ECOD (develop294) |
| T | Thymidylat_synt | e4toeT1 | A: alpha bundles | X: Four-helical up-and-down bundle | H: Thymidylate synthase/dCMP hydroxymethylase | T: Thymidylate synthase/dCMP hydroxymethylase | F: Thymidylat_synt | ECOD (develop294) |
| S | Thymidylat_synt | e4toeS1 | A: alpha bundles | X: Four-helical up-and-down bundle | H: Thymidylate synthase/dCMP hydroxymethylase | T: Thymidylate synthase/dCMP hydroxymethylase | F: Thymidylat_synt | ECOD (develop294) |
| R | Thymidylat_synt | e4toeR1 | A: alpha bundles | X: Four-helical up-and-down bundle | H: Thymidylate synthase/dCMP hydroxymethylase | T: Thymidylate synthase/dCMP hydroxymethylase | F: Thymidylat_synt | ECOD (develop294) |
| Q | Thymidylat_synt | e4toeQ1 | A: alpha bundles | X: Four-helical up-and-down bundle | H: Thymidylate synthase/dCMP hydroxymethylase | T: Thymidylate synthase/dCMP hydroxymethylase | F: Thymidylat_synt | ECOD (develop294) |
| P | Thymidylat_synt | e4toeP1 | A: alpha bundles | X: Four-helical up-and-down bundle | H: Thymidylate synthase/dCMP hydroxymethylase | T: Thymidylate synthase/dCMP hydroxymethylase | F: Thymidylat_synt | ECOD (develop294) |
| O | Thymidylat_synt | e4toeO1 | A: alpha bundles | X: Four-helical up-and-down bundle | H: Thymidylate synthase/dCMP hydroxymethylase | T: Thymidylate synthase/dCMP hydroxymethylase | F: Thymidylat_synt | ECOD (develop294) |
| N | Thymidylat_synt | e4toeN1 | A: alpha bundles | X: Four-helical up-and-down bundle | H: Thymidylate synthase/dCMP hydroxymethylase | T: Thymidylate synthase/dCMP hydroxymethylase | F: Thymidylat_synt | ECOD (develop294) |
| M | Thymidylat_synt | e4toeM1 | A: alpha bundles | X: Four-helical up-and-down bundle | H: Thymidylate synthase/dCMP hydroxymethylase | T: Thymidylate synthase/dCMP hydroxymethylase | F: Thymidylat_synt | ECOD (develop294) |
| L | Thymidylat_synt | e4toeL1 | A: alpha bundles | X: Four-helical up-and-down bundle | H: Thymidylate synthase/dCMP hydroxymethylase | T: Thymidylate synthase/dCMP hydroxymethylase | F: Thymidylat_synt | ECOD (develop294) |
| K | Thymidylat_synt | e4toeK1 | A: alpha bundles | X: Four-helical up-and-down bundle | H: Thymidylate synthase/dCMP hydroxymethylase | T: Thymidylate synthase/dCMP hydroxymethylase | F: Thymidylat_synt | ECOD (develop294) |
| J | Thymidylat_synt | e4toeJ1 | A: alpha bundles | X: Four-helical up-and-down bundle | H: Thymidylate synthase/dCMP hydroxymethylase | T: Thymidylate synthase/dCMP hydroxymethylase | F: Thymidylat_synt | ECOD (develop294) |
| I | Thymidylat_synt | e4toeI1 | A: alpha bundles | X: Four-helical up-and-down bundle | H: Thymidylate synthase/dCMP hydroxymethylase | T: Thymidylate synthase/dCMP hydroxymethylase | F: Thymidylat_synt | ECOD (develop294) |
| H | Thymidylat_synt | e4toeH1 | A: alpha bundles | X: Four-helical up-and-down bundle | H: Thymidylate synthase/dCMP hydroxymethylase | T: Thymidylate synthase/dCMP hydroxymethylase | F: Thymidylat_synt | ECOD (develop294) |
| G | Thymidylat_synt | e4toeG1 | A: alpha bundles | X: Four-helical up-and-down bundle | H: Thymidylate synthase/dCMP hydroxymethylase | T: Thymidylate synthase/dCMP hydroxymethylase | F: Thymidylat_synt | ECOD (develop294) |
| F | Thymidylat_synt | e4toeF1 | A: alpha bundles | X: Four-helical up-and-down bundle | H: Thymidylate synthase/dCMP hydroxymethylase | T: Thymidylate synthase/dCMP hydroxymethylase | F: Thymidylat_synt | ECOD (develop294) |
| E | Thymidylat_synt | e4toeE1 | A: alpha bundles | X: Four-helical up-and-down bundle | H: Thymidylate synthase/dCMP hydroxymethylase | T: Thymidylate synthase/dCMP hydroxymethylase | F: Thymidylat_synt | ECOD (develop294) |
| D | Thymidylat_synt | e4toeD1 | A: alpha bundles | X: Four-helical up-and-down bundle | H: Thymidylate synthase/dCMP hydroxymethylase | T: Thymidylate synthase/dCMP hydroxymethylase | F: Thymidylat_synt | ECOD (develop294) |
| C | Thymidylat_synt | e4toeC1 | A: alpha bundles | X: Four-helical up-and-down bundle | H: Thymidylate synthase/dCMP hydroxymethylase | T: Thymidylate synthase/dCMP hydroxymethylase | F: Thymidylat_synt | ECOD (develop294) |
| B | Thymidylat_synt | e4toeB1 | A: alpha bundles | X: Four-helical up-and-down bundle | H: Thymidylate synthase/dCMP hydroxymethylase | T: Thymidylate synthase/dCMP hydroxymethylase | F: Thymidylat_synt | ECOD (develop294) |
| A | Thymidylat_synt | e4toeA1 | A: alpha bundles | X: Four-helical up-and-down bundle | H: Thymidylate synthase/dCMP hydroxymethylase | T: Thymidylate synthase/dCMP hydroxymethylase | F: Thymidylat_synt | ECOD (develop294) |