“…Similar behavior is exhibited in other MD studies in vacuum and in solvated lipid bilayer environment (Duneau et al, 1999(Duneau et al, , 1996Lee et al, 2000). p-Helical segments, sometimes called a-aneurisms, have been found experimentally (Keefe et al, 1993;Morgan et al, 2001;Rajashankar and Ramakumar, 1996), and they are believed to be intimately involved in protein function (Weaver, 2000). In the case of TM helices, p-helical turns seem necessary to accommodate long residue strings inside the lipid bilayer (Popot and Engelman, 2000).…”