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

Abstract EN

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.