| P13272 | n/a | 5okd | PX4 | E | 202 | e5okdE1 | iron-sulfur subunit (ISP) transmembrane anchor | iron-sulfur subunit (ISP) transmembrane anchor | iron-sulfur subunit (ISP) transmembrane anchor | UCR_TM |
| P13272 | n/a | 6haw | PX4 | E | 202 | e6hawE1 | iron-sulfur subunit (ISP) transmembrane anchor | iron-sulfur subunit (ISP) transmembrane anchor | iron-sulfur subunit (ISP) transmembrane anchor | UCR_TM |
| P13272 | n/a | 6xvf | PX4 | E | 202 | e6xvfE2 | iron-sulfur subunit (ISP) transmembrane anchor | iron-sulfur subunit (ISP) transmembrane anchor | iron-sulfur subunit (ISP) transmembrane anchor | UCR_TM |
| P13272 | n/a | 6zfs | PX4 | E | 202 | e6zfsE1 | iron-sulfur subunit (ISP) transmembrane anchor | iron-sulfur subunit (ISP) transmembrane anchor | iron-sulfur subunit (ISP) transmembrane anchor | UCR_TM |
| P13272 | n/a | 6zft | PX4 | E | 202 | e6zftE1 | iron-sulfur subunit (ISP) transmembrane anchor | iron-sulfur subunit (ISP) transmembrane anchor | iron-sulfur subunit (ISP) transmembrane anchor | UCR_TM |
| P13272 | n/a | 6zfu | PX4 | E | 202 | e6zfuE2 | iron-sulfur subunit (ISP) transmembrane anchor | iron-sulfur subunit (ISP) transmembrane anchor | iron-sulfur subunit (ISP) transmembrane anchor | UCR_TM |
| P13272 | n/a | 7r3v | PX4 | E | 202 | e7r3vE1 | iron-sulfur subunit (ISP) transmembrane anchor | iron-sulfur subunit (ISP) transmembrane anchor | iron-sulfur subunit (ISP) transmembrane anchor | UCR_TM |