| A | SPP | e4hycA2 | A: alpha arrays | X: Presenilin family intramembrane aspartate proteases (From Topology) | H: Presenilin family intramembrane aspartate proteases (From Topology) | T: Presenilin family intramembrane aspartate proteases | F: SPP | ECOD (1.6) |
| B | SPP | e4hycB2 | A: alpha arrays | X: Presenilin family intramembrane aspartate proteases (From Topology) | H: Presenilin family intramembrane aspartate proteases (From Topology) | T: Presenilin family intramembrane aspartate proteases | F: SPP | ECOD (1.6) |
| C | SPP | e4hycC2 | A: alpha arrays | X: Presenilin family intramembrane aspartate proteases (From Topology) | H: Presenilin family intramembrane aspartate proteases (From Topology) | T: Presenilin family intramembrane aspartate proteases | F: SPP | ECOD (1.6) |
| D | SPP | e4hycD2 | A: alpha arrays | X: Presenilin family intramembrane aspartate proteases (From Topology) | H: Presenilin family intramembrane aspartate proteases (From Topology) | T: Presenilin family intramembrane aspartate proteases | F: SPP | ECOD (1.6) |
| E | SPP | e4hycE2 | A: alpha arrays | X: Presenilin family intramembrane aspartate proteases (From Topology) | H: Presenilin family intramembrane aspartate proteases (From Topology) | T: Presenilin family intramembrane aspartate proteases | F: SPP | ECOD (1.6) |
| F | SPP | e4hycF2 | A: alpha arrays | X: Presenilin family intramembrane aspartate proteases (From Topology) | H: Presenilin family intramembrane aspartate proteases (From Topology) | T: Presenilin family intramembrane aspartate proteases | F: SPP | ECOD (1.6) |
| G | SPP | e4hycG2 | A: alpha arrays | X: Presenilin family intramembrane aspartate proteases (From Topology) | H: Presenilin family intramembrane aspartate proteases (From Topology) | T: Presenilin family intramembrane aspartate proteases | F: SPP | ECOD (1.6) |
| H | SPP | e4hycH2 | A: alpha arrays | X: Presenilin family intramembrane aspartate proteases (From Topology) | H: Presenilin family intramembrane aspartate proteases (From Topology) | T: Presenilin family intramembrane aspartate proteases | F: SPP | ECOD (1.6) |