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Related Concept Videos

Amino Acid Biosynthetic Pathways01:29

Amino Acid Biosynthetic Pathways

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Amino acid biosynthesis is essential for cell growth, protein synthesis, and metabolic regulation. Cells generate essential and non-essential amino acids from metabolic intermediates to sustain vital biological functions. These intermediates originate from key metabolic pathways: glycolysis, the tricarboxylic acid (TCA) cycle, and the pentose phosphate pathway. Important precursors include α-ketoglutarate, pyruvate, oxaloacetate, phosphoenolpyruvate, and erythrose-4-phosphate, which...
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Amino Acid Catabolism01:18

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Microorganisms rely on proteins as an essential carbon and energy source, particularly in environments with limited polysaccharides or lipids. However, proteins are too large to cross the plasma membrane unaided, necessitating enzymatic degradation. Microbes secrete extracellular proteases and peptidases that hydrolyze proteins into peptides, which can then be transported across the membrane. Once inside the cell, intracellular proteases degrade these peptides into free amino acids, which...
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Amino acids03:42

Amino acids

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Amino acids are the monomers that comprise proteins. Each amino acid has the same fundamental structure, which consists of a central carbon atom, or the alpha (α) carbon, bonded to an amino group (NH2), a carboxyl group (COOH), and to a hydrogen atom. Every amino acid also has another atom or group of atoms bonded to the central atom known as the R group. There are 20 common amino acids present in proteins, each with a different R group. Variation in the amino acid sequence is responsible for...
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Solution Composition During Acid/Base Titrations01:17

Solution Composition During Acid/Base Titrations

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The titration of a weak acid with a strong base results in the formation of water and the conjugate base of the acid. For instance, titrating acetic acid with sodium hydroxide leads to the formation of water and sodium acetate. A solution of acetic acid and sodium acetate constitutes a buffer whose relative concentration at different stages of the titration is indicated by the α values, which represent percentages of the weak acid and its conjugate base.
The α0 and α1 values...
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Composition of Polyprotic Acid Solutions as a Function of pH01:19

Composition of Polyprotic Acid Solutions as a Function of pH

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Polyprotic acids of the type H2M constitute two ionizable protons. As a result, on titration with a base, they exhibit two equivalence points in the titration curve. During titration, the species H2M, HM−, and M2− will be present in the solution at different points. The fractions of H2M, HM−, and M2− present at the various instances of the titration are denoted by α0, α1, and α2, respectively.
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Phase II Reactions: Sulfation and Conjugation with α-Amino Acids01:19

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Sulfation and α-amino acid conjugation are two critical biotransformation reactions in drug metabolism. Sulfation, a phase II biotransformation reaction, involves adding a polar sulfate group to a drug, enhancing its water solubility and promoting excretion. This process can either co-occur with or occur independently of glucuronidation. Nonmicrosomal sulfotransferase enzymes catalyze the process. The reaction involves 3'-phosphoadenosine-5'-phosphosulfate or PAPS coenzyme...
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Articles linked to this work by shared authors, journal, and citation graph.

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[Toxicity and nutritive action of Pharmakhim's sodium monensin in weaned lambs].

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[Chemical composition of the meat of emergency-slaughtered calves].

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[Hygienic research on meat-dressing shops and enterprises].

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[Fatty acid content of the lipid fraction of the liver and fatty tissues of fattened geese].

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[Amino acid composition of lamb]

G Monov, N Ibrishimov

    Veterinarno-Meditsinski Nauki
    |January 1, 1980
    PubMed
    Summary

    The amino acid profile of Blackheaded Pleven sheep longissimus dorsi muscle was analyzed. Its composition is similar to that found in cattle and swine longissimus dorsi.

    Area of Science:

    • Animal Science
    • Biochemistry
    • Food Science

    Context:

    • The longissimus dorsi muscle is a significant component of meat products.
    • Understanding the amino acid composition of meat is crucial for nutritional and quality assessments.
    • The "Blackheaded Pleven" breed is a notable sheep population in Bulgaria.

    Purpose:

    • To quantitatively and qualitatively analyze the amino acid composition of the longissimus dorsi muscle proteins in "Blackheaded Pleven" sheep.
    • To compare the amino acid profile of sheep longissimus dorsi with that of cattle and swine.

    Summary:

    • An automatic amino acid analyzer (1200 E) was utilized for precise determination of amino acids.
    • Key amino acids identified (g/16g N) include lysine (7.90), glutamic acid (11.49), leucine (7.54), and aspartic acid (7.16).

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  • Hydroxyproline (0.42) and tryptophan (1.39) were specifically quantified.

    • Impact:

    • Provides detailed nutritional data for "Blackheaded Pleven" sheep meat.
    • Establishes a basis for comparative studies on meat quality across different livestock species.
    • Contributes to the scientific understanding of muscle protein composition in ruminants.