COMPOSITION EN ACIDES AMINES DE LA THYROGLOBULINE DE DIFFERENTES ESPECES ANIMALES

Abstract

ABSTRACT Amino acid composition of S19 thyroglobulin of eight species (seven mammals and one bird) has been determined. A statistical study of the results shows significant variations of all amino acids except valine, leucine and cystine. Beef, horse and hog thyroglobulins have a very similar, if not identical, amino acid composition. The remarkable constancy of the valine, leucine and cystine contents as well as the sum of the amino acids with hydrophobic side chain, suggests a great similarity of the secondary and tertiary structures of the studied thyroglobulins.