Crystal Structure of Locally Available Tassar Fibers Based on Amino Acid Sequence: Using X-Ray Data and LALS Method

Abstract

X-ray diffraction pattern from locally available Tassar fibers was recorded using imaging plate system (Dip-100S). The pattern was used along with fiber processing software to identify the reflections and to compute X-ray intensities. A molecular model was first constructed with standard bond lengths and angles using helical symmetry and layer-line spacing observed in the X-ray pattern. The model was then refined against observed X-ray data using linked-atom least-squares (LALS) method. The crystal and molecular structure of Tassar fibers is reported. It is concluded that the sheet structures formed by hydrogen bonds assume the antipolar-antiparallel arrangement.