Figure 7
From: Hydrophobic pulses predict transmembrane helix irregularities and channel transmembrane units
The concept of transmembrane unit (TMU). The hatched area symbolizes the membrane. TMS correspond to the embedded part of α-helices. A TMH is composed of one (H2 and H3) or more (H1a and H1b) α-helices. The TMU groups together structures that are comprised between two G2-HPulses: it can contain a single α-helix, like TMU2, or associate TMH and small structures localized near the membrane, like TMU3 that contains H3 and H2-H3.