How alpha 1 helix is different from alpha 2 helix. I have been reading the following paper in which they mention in Figure 1 of page 9. Alpha helix one region corresponds to (-70,-30) and alpha 2 helix region corresponds to (-100,5) as mentioned in the article. There is a region called G(80,-170). What is the difference between alpha one and Alpha to regions? What is G region as mentioned in the paper?