Abstract

The secondary structure content of Panulirus interruptus hemocyanin crystals is estimated to be 29±5% helix and 42±4% ß-strand. These estimates are obtained from an analysis of the Raman amide I spectrum. This report constitutes a test of this method of analyzing Raman spectra since the X-ray structure of P. interruptus, which is unknown to us, is under intensive study. Also, the amide I spectrum of P. interruptus in solution, at a somewhat higher pH, is significantly different from the spectrum of crystals which indicates that the secondary structure content may be different in the solution sample.

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