Figure 2From: Structural organization and interactions of transmembrane domains in tetraspanin proteinsSequence alignment of the transmembrane domains 3 and 4 of 28 human tetraspanins. Residues from heptad positions a and d in TM3 are highlighted. Also highlighted are the conserved Glu/Gln residue in TM4, other polar residues and cysteines. The color scheme is as in Figure 1.Back to article page