Sequences and function of ABC efflux transporters in bivalve gills were explored.
Full length Dreissena polymorpha abcb1 and abcc1 cDNA sequences were identified.
A mixture effect design with inhibitors was applied in transporter activity assays.
ABCB1- and ABCC-type efflux activities were distinguished in native gill tissue.
Inhibitory action of environmental chemicals targeted ABCB1-type efflux activity.