| SCOP superfamily ID | superfamiily description | corresponding fold description |
|---|---|---|
| f.20.1 | Clc chloride channel | Clc chloride channel core: 18 transmembrane helices |
| f.38.1 | MFS general substrate transporter | MFS general substrate transporter 12 transmembrane helices; duplication: the N- and C-terminal halves are structurally similar |