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Sulfur Assimilation01:20

Sulfur Assimilation

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Sulfur is an essential element in biological systems, contributing to synthesizing key biomolecules, including amino acids such as cysteine and methionine, and cofactors such as coenzyme A and biotin. Microorganisms primarily assimilate sulfur as sulfate (SO₄²⁻) from the environment, which must undergo a series of biochemical transformations before it can be incorporated into cellular components. As sulfate is highly oxidized, it must undergo assimilatory sulfate reduction to...
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Factors Affecting Drug Biotransformation: Biological01:19

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Biological factors significantly impact drug metabolism, influencing drug clearance, efficacy, and potential toxicity.
Species differences: Variations in enzyme systems across species can cause disparities in drug metabolism. For instance, humans may metabolize certain drugs faster than rodents, altering therapeutic effects.
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Vitamins01:30

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Vitamins, derived from the Latin word for life, are essential organic substances required in small quantities for optimal growth and overall well-being. Unlike other organic nutrients, vitamins don't act as sources of energy or building materials but rather facilitate these nutrients' utilization by the body. Vitamins are predominantly coenzymes, assisting enzymes in specific chemical actions, like the oxidation of glucose for energy involving B vitamins. Most vitamins are not produced...
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Pharmaceutical substances known as xenobiotics are predominantly lipophilic and nonionized. This enables them to permeate lipid bilayers, such as cell membranes, and interact with intracellular target receptors. Lipophilic drugs have an advantage in crossing biological barriers and reaching their intended sites of action. However, lipophilic drugs often have a restricted capacity for renal expulsion or elimination from the body. When these drugs enter the kidneys and undergo glomerular...
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Updated: Jan 9, 2026

In Vitro Biochemical Assays using Biotin Labels to Study Protein-Nucleic Acid Interactions
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Biotin: biochemical, physiological and clinical aspects.

Hamid M Said1

  • 1University of California-School of Medicine, Irvine, CA, USA, hmsaid@uci.edu.

Sub-Cellular Biochemistry
|November 26, 2011
PubMed
Summary

Biotin (vitamin H) is crucial for metabolic reactions, supporting human health, growth, and development. Biotin deficiency causes severe health issues, including developmental problems and neurological disorders.

Area of Science:

  • Biochemistry
  • Human Nutrition
  • Physiology

Background:

  • Biotin (vitamin H) is a vital water-soluble vitamin.
  • It plays essential roles in critical cellular metabolic reactions.
  • Biotin is indispensable for normal human health, growth, and development.

Purpose of the Study:

  • To provide comprehensive coverage of biotin nutrition.
  • To detail the biochemical, physiological, and clinical aspects of biotin.
  • To synthesize current knowledge on biotin's role in health and development.

Main Methods:

  • Literature review of existing research on biotin.
  • Synthesis of information from recent reviews and studies.
  • Compilation of knowledge on biotin's metabolic functions and clinical significance.

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Main Results:

  • Biotin is essential for numerous metabolic pathways.
  • Biotin deficiency leads to significant health problems, including growth retardation, neurological disorders, and dermatological abnormalities.
  • Animal studies demonstrate biotin's critical role during pregnancy, preventing embryonic abnormalities and death.

Conclusions:

  • Biotin is fundamental for cellular metabolism and overall health.
  • Understanding biotin's nutritional and physiological roles is key to preventing deficiency-related disorders.
  • Further research and awareness of biotin's importance are essential for public health.