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Molecular images of cereal proteins by STM
N H Thomson1, M J Miles, A S Tatham
1H.H. Wills Physics Laboratory, University of Bristol, UK.
Ultramicroscopy
|July 1, 1992
Abstract:
Scanning tunnelling microscopy (STM) has been used to study a seed storage protein of wheat known as gamma-gliadin. The protein was deposited onto highly oriented pyrolytic graphite (HOPG) from solutions of trifluoroethanol (TFE) and 1% acetic acid. Samples were dried down and then scanned in air. Transmission electron microscopy (TEM) was also used to visualise the distribution of protein on the substrate. Small-angle X-ray scattering (SAXS) was used to compare the molecular size and shape obtained with those from the STM images.