Membrane Proteins Structural Bioinformatics Group, School of Medicine, Swansea University, Singleton Park, Swansea SA2 8PP, Wales, UK.|Membrane Proteins Structural Bioinformatics Group, School of Medicine, Swansea University, Singleton Park, Swansea SA2 8PP, Wales, UK.|Membrane Proteins Structural Bioinformatics Group, School of Medicine, Swansea University, Singleton Park, Swansea SA2 8PP, Wales, UK.