Transmembrane domain of ABC transporters

ABC transporter transmembrane domain is the main transmembrane structural unit of ATP-binding cassette transporter proteins, consisting of six alpha helixes that traverse the plasma membrane. Many members of the ABC transporter family () have two such regions.
This family appears to correspond to ABC1 by TCDB classification.
Human proteins containing this domain.
ABCB1; ABCB10; ABCB11; ABCB4; ABCB5; ABCB6; ABCB7; ABCB8;
ABCB9; ABCC1; ABCC10; ABCC11; ABCC12; ABCC13; ABCC2; ABCC3;
ABCC4; ABCC5; ABCC6; ABCC8; ABCC9; CFTR; 
TAP1; TAP2; TAPL;