AROMATIC ALDEHYDE DERIVATIVES OF PROTEINS, PEPTIDES, AND AMINO ACIDS

Action of carboxypeptidase toward peptides containing unnatural aromatic amino acids.

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Absorption kinetics of amino acids, peptides, and intact proteins.

The small intestine acts as interface and regulator between the gut lumen and the rest of the body and controls the degree and rate of transport of amino acids coming from dietary protein via the portal vein to the liver and the systemic circulation. To measure protein absorption, kinetics multicatheter animal (pig) models in combination with amino acid tracer technology are available. Dietary ...

Proteins, Peptides and Amino Acids: Role in Infant Nutrition.

Proteins are polymers composed of 30 or more amino acids; some of them are essential dietary components, since they are not synthetized by human metabolic processes. They are crucial for healthy growth and development and influence major functions of the body. The infant's first year is a critical time of rapid growth and development, which must be supported by a high rate of protein synthesis....

Hydrogen-addition radicals formed in the aromatic rings of amino acids, polyamino acids, and proteins.

Since the original detection of electron spin resonance (ESR) signals from free radicals formed by ionizing irradiation in the amino acids and proteins,' numerous ESR studies of these and other powdered peptides have been made.2-'0 The free radicals that have been identified in these studies have been formed for the most part by the breakage of a CaH bond to leave the electron spin concenltrate...

Metabolism of aromatic amino acids and amines.