41. Traditional mine train roller coaster track elements include several banked turns and helices . 42. These ?-sheets are surrounded on both sides by ?-helices . 43. While most subfamilies have 10 transmembrane helices , there are some notable exceptions. 44. The crystal structure of GADD45G reveals a dimer made of four parallel helices . 45. The structure is stabilised by disulfide bonds linking the helices to each other. 46. The TAZ domain adopts an all-alpha helices . 47. S6 segments are transmembrane helices within the channel protein. 48. A previously undescribed proton translocation pathway is formed by six core transmembrane helices . 49. It is predicted to function through protein-protein interactions via two amphipathic helices . 50. As a homodimer, sulfite oxidase contains two identical subunits with an alpha helices .
