title: Phospholipid tubelets.
abstract: A novel electron microscopy specimen protocol shows that the presumed phospholipid bilayer membrane ribbons that wind helically to form the cylinders known as "tubules" are actually flattened tubes. These flattened tubes are alternatively found with a helical twist about the tube's long axis or occasionally flat with no winding or twist. Flat, cylindrically wound and axially twisted segments are routinely found along a single tube's length, and at the helically wound and axially twisted segment junctions, the chiral sense of the structure often, but not always, changes chiral sense.
authors.affiliation: Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803, USA.
authors.forename: Bijaya K
authors.initials: BK
authors.lastname: Mishra
authors.forename: Colleen C
authors.initials: CC
authors.lastname: Garrett
authors.forename: Britt N
authors.initials: BN
authors.lastname: Thomas
mesh_terms: D053280:Diynes; D005614:Freeze Fracturing; D008051:Lipid Bilayers / Q000737:chemistry*; D018625:Microscopy, Atomic Force; D008855:Microscopy, Electron, Scanning; D009113:Muramidase / Q000737:chemistry; D010713:Phosphatidylcholines / Q000737:chemistry*
chemical_list: D053280:Diynes; D008051:Lipid Bilayers; D010713:Phosphatidylcholines; C053923:1,2-bis(10,12-tricosadiynoyl)phosphatidylcholine; D009113:Muramidase