Module 3: Figure ABC transporters
Domain structure of ABC transporters.
The ATP-binding cassette (ABC) transporters have different domain structures. A. There are three transmembrane domains (TMBs) and two nucleotide-binding domains (NBDs). B. These transporters have two TMBs and two NBDs, which are shown in more detail in the lower figure. C. Some members of the family are half-transporters that have a single TMB and a single NBD.