| SCOP superfamily ID | superfamiily description | corresponding fold description |
|---|---|---|
| f.24.1 | Cytochrome c oxidase subunit I-like | Cytochrome c oxidase subunit I-like 12 transmembrane helices in an approximate threefold rotational symmetric arrangement |
| f.29.1 | Photosystem I subunits PsaA/PsaB | Photosystem I subunits PsaA/PsaB core:11 transmembrane helices |