TABLE 4

Basal ATPase activities in detergent and proteoliposomes

TransporterBasal activity (nmol Pi/min/mg of protein) in:
DetergentProteoliposomes
EfrAB3,689 ± 61939 ± 76
EfrCD2,329 ± 130549 ± 66
EfrEF805 ± 11146 ± 14
EF0942/41578 ± 91,663 ± 137
EF1592/93a−0.3 ± 2.4NDb
EF1733/32348 ± 4ND
EF2593/9212,146 ± 536ND
  • a This purified transporter had no measurable ATPase activity.

  • b ND, not determined.