Related Experiment Video

Updated: Jun 21, 2026

Protocol for Three-dimensional Confocal Morphometric Analysis of Astrocytes
09:13

Protocol for Three-dimensional Confocal Morphometric Analysis of Astrocytes

Published on: December 11, 2015

Effects of thyroxin on amino acid incorporation into protein

L SOKOLOFF, S KAUFMAN

    Science (New York, N.Y.)
    |February 27, 1959
    PubMed

    The effect of thyroxin on the in vitro incorporation of dl-leucine-l-C(14) into the protein of rat liver homogenates has been investigated. Both thyroxin pretreatment in vivo and thyroxin in vitro at a concentration of 1 x 10(-5) M were found to increase the rate of amino acid incorporation. The increased activity following the thyroxin pretreatment in vivo was found to be localized in the mitochondrial fraction. It is suggested that the acceleration of metabolic rate characteristic of thyroxin action may be secondary to the stimulation of energy-requiring reactions such as protein synthesis.

    Keywords:
    AMINO ACIDS/metabolismLIVER/metabolismPROTEINS/metabolismTHYROXIN/effects

    More Related Videos

    Evaluation of the Impact of Protein Aggregation on Cellular Oxidative Stress in Yeast11:04

    Evaluation of the Impact of Protein Aggregation on Cellular Oxidative Stress in Yeast

    Published on: June 23, 2018

    A11-positive β-amyloid Oligomer Preparation and Assessment Using Dot Blotting Analysis06:17

    A11-positive β-amyloid Oligomer Preparation and Assessment Using Dot Blotting Analysis

    Published on: May 22, 2018

    Related Concept Videos

    Protein Organization01:13

    Protein Organization

    Overview
    Protein and Protein Structure02:15

    Protein and Protein Structure

    Proteins are one of the most abundant organic molecules in living systems and have the most diverse range of functions of all macromolecules. Proteins may be structural, regulatory, contractile, or protective. They may serve in transport, storage, or membranes; or they may be toxins or enzymes. Their structures, like their functions, vary greatly. They are all, however, amino acid polymers arranged in a linear sequence.
    A protein's shape is critical to its function. For example, an enzyme can...
    Insulin Secretory Vesicles01:05

    Insulin Secretory Vesicles

    Insulin secretory vesicles release insulin to stimulate blood glucose uptake and regulate carbohydrate metabolism. When the blood glucose levels increase, glucose enters the pancreatic β-islet cells through glucose transporters. Once inside, glucose is metabolized through glycolysis, the citric acid cycle, and the electron transport chain, producing ATP. This increase in ATP concentration closes ATP-sensitive potassium channels, leading to depolarization of the membrane and the opening of...
    Allosteric Proteins-ATCase01:19

    Allosteric Proteins-ATCase

    Binding sites linkages can regulate a protein's function.  For example, enzyme activity is often regulated through a feedback mechanism where the end product of the biochemical process serves as an inhibitor.
    Aspartate transcarbamoylase (ATCase) is a cytosolic enzyme that catalyzes the condensation of L-aspartate and carbamoyl phosphate to  N-carbamoyl-L-aspartate. This reaction is the first step in pyrimidine biosynthesis. UTP and CTP, the end products of the pyrimidine synthesis pathway,...
    Protein Organization01:24

    Protein Organization

    Proteins are polymers of amino acid residues. They are versatile and responsible for different cellular functions, including DNA replication, molecular transport, catalysis, and structural support. Proteins have a hierarchical structure comprising at least three levels of organization: primary, secondary, and tertiary structure. Some large proteins have a quaternary structure where individual protein subunits are linked together.
    The primary structure of a protein is its amino acid sequence.
    Factors Affecting Protein-Drug Binding: Protein-Related Factors01:20

    Factors Affecting Protein-Drug Binding: Protein-Related Factors

    Drug binding to proteins is a key aspect of pharmacokinetics and can influence a drug's distribution, absorption, and elimination in the body. Several factors, including the drug's physiochemical properties, protein concentration, disease states, and the number of binding sites on the protein, influence this process.
    The physicochemical properties of a drug play a significant role in its ability to bind to proteins. Lipophilic drugs, which dissolve in fats, oils, and lipids, can be bound by...