4 component system: The ATP-binding Cassette (ABC) Superfamily
| Q1M7Q1 | Putative ABC transporter component |
|---|---|
| Q1M7Q2 | Putative spermidine/putrescine transport system ABC transporter permease component |
| Q1M7Q3 | Putative spermidine/putrescine transport system ABC transporter permease protein |
| Q1M7Q4 | Putative spermidine/putrescine-binding periplasmic protein ABC transporter component |