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It has been demonstrated that both elastin and tropoelastin preparations obtained from aortae of spontaneously hypertensive rats at the stage of established hypertension differ in their amino acid composition from age-matching controls. The differences refer to an increased proportion of polar amino acids, particularly aspartic and glutamic acid (about a two-fold increase compared to the controls) and arginine and tyrosine (1.5 times the control value). On the other hand, this increase is compensated for by a decrease in the valine concentration. Furthermore, direct estimation of the number of val-pro sequence in different elastin preparations indicated a drop from 49.3 to 29.2 per 1,000 residues in normotensive controls and preparations obtained from spontaneously hypertensive rats respectively.
K G Prodanov, and
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K Macek
May 1985,
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