There are disclosed \u03b2-sheet mimetics and methods relating to the same for imparting or stabilizing the \u03b2-sheet structure of a peptide, protein or molecule. These measurement positions are offset by 180\xb0 to one another and are located in the plane of the three shafts. Additionally, positioning portions for positioning the magnetic tape cassette relative to a magnetic tape drive device are formed of a differential resin from the resin of the remaining part of the cassette case. In the example method, the second playback queue comprises a list of one or more items for playback by the playback device. Templates may be created or eliminated based on a frequency of use. The conductive coating forms at least part of an electrical connection between the leads.