Top view of the structure 3L1L shown by helical wheels, interhelical interactions and observed rASA of the TM residues. Each TM residue is shown by a color-coded gradient scale of its observed rASA, with dark red and dark blue representing rASA value 1.0 for extremely buried and 0 for extremely exposed, respectively. The red arrow inside each helical wheel indicates the lipid-facing direction, and the green clock-wise arrow starts at the first amino acid.
Lai et al. BMC Bioinformatics 2013 14:304 doi:10.1186/1471-2105-14-304