Figure 6
From: Structural organization and interactions of transmembrane domains in tetraspanin proteins
Structural model of TM1-TM2 interaction in CD9. Shown are space-filling models of CD9 TM1 (panel A), TM2 (panel B), and the two helices together (panel C). Small and large residues of heptad positions a and d, which form the crucial contacts between the helices, are shown in green and red, respectively. Asn18 is shown in blue, Leu14 and Phe17 in yellow, and Gly80 in light green.