Title

The Buoyant Properties of Synthetic and Natural Polypeptides

Publication Year

1968

Keywords

polypeptides, buoyancy, synthetic, amino acid, homopolypeptides

Disciplines

Biology | Cell and Developmental Biology | Life Sciences | Medicine and Health Sciences

Abstract

The buoyant behavior of six reactive-group homopolypeptides (i.e. synthetic polypeptides which are constructed from a single type of amino acid which is ionizable in aqueous solution) is examined in CsCl as a function of pH in the analytical ultracentrifuge, by the method of establishing sedimentation equilibrium in a density gradient. The homopolypeptides studied are poly-L-glutamic acid(b) (P-Glu), poly-L-aspartic acid (P-Asp), poly-L-lysine hydrobromide (P-Lys), poly-L-histidine (P-His), poly-L-tyrosine (P-Tyr), and poly-L-arginine hydrochloride (P-Arg).

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