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The Carbon Cycle01:14

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Carbon is the basis of all organic matter on Earth, and is recycled through the ecosystem in two primary processes: one in which carbon is exchanged among living organisms, and one in which carbon is cycled over long periods of time through fossilized organic remains, weathering of rocks, and volcanic activity. Human activities, including increased agricultural practices and the burning of fossil fuels, has greatly affected the balance of the natural carbon cycle.
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Life on Earth is carbon-based, as all macromolecules that make up living organisms contain carbon atoms. All organic compounds have a carbon backbone. Each carbon atom is tetravalent and can bond with four other atoms, making it an extraordinarily flexible component of biological molecules. Because carbon’s valence electrons are stable, it rarely becomes an ion. As the carbon chain increases in length, structural modifications such as ring structures, double bonds, and branching side...
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Atmospheric CO2 penetrates the concrete's pores and, in the presence of moisture, forms carbonic acid, which then reacts with calcium hydroxide in the hydrated cement, forming calcium carbonate. This process reduces the concrete's volume and is termed carbonation shrinkage.
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Carbon dioxide fixation in prokaryotes enables the assimilation of inorganic carbon into organic molecules, supporting biosynthetic pathways, sustaining ecosystems, and contributing to the global carbon cycle. It also has industrial applications in carbon capture and bioproduct synthesis. Autotrophic organisms rely on this process to utilize CO₂ as a carbon source in diverse environments.The Calvin CycleThe Calvin cycle is the most widespread carbon fixation mechanism, primarily used by...
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Carbon dioxide (CO2) transport in the blood is critical to human physiology. On average, our body cells produce around 200 mL of CO2 per minute, precisely the quantity expelled by the lungs. This process involves the transportation of CO2 from the tissue cells to the lungs in three primary forms.
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Carbonic anhydrases as disease markers.

Sabina Zamanova1, Ahmed M Shabana1, Utpal K Mondal1

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Carbonic anhydrase (CA) isozymes are vital biomarkers for diagnosing various diseases. Research shows a significant expansion in their use beyond cancer, indicating broader diagnostic potential.

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Area of Science:

  • Biochemistry
  • Biomarker Research
  • Enzymology

Background:

  • Carbonic anhydrase (CA) facilitates crucial CO2/HCO3- interconversion in human tissues.
  • Fourteen distinct CA isozymes exist in humans, each with potential as a diagnostic biomarker.
  • Recent research trends show increasing focus on CA isozymes in patents and scientific literature.

Purpose of the Study:

  • To review the expanding role of carbonic anhydrase isozymes as biomarkers for diverse diseases.
  • To highlight key studies and recent patent literature concerning CA isozyme applications.
  • To present the state-of-the-art in CA isozyme detection and quantification for clinical use.

Main Methods:

  • Comprehensive literature and patent search focused on carbonic anhydrase isozymes as biomarkers.
  • Analysis of trends in CA biomarker research over the last decade.
  • Review of clinical applications, detection techniques, and statistical data for various CA isozymes.

Main Results:

  • CA isozyme research has expanded significantly, moving beyond cancer diagnostics (CA IX, CA XII) to a wider range of diseases.
  • CA isozymes are increasingly utilized alone, in combination with other CA isozymes, or with other proteins for disease detection and prognosis.
  • The review details specific clinical examples and statistical data supporting the use of CA isozymes in diagnosing numerous human dysfunctions.

Conclusions:

  • Carbonic anhydrase isozymes represent a rapidly evolving area of biomarker research with broad diagnostic potential.
  • The shift towards utilizing a wider array of CA isozymes signifies advancements in disease detection, staging, and prognosis.
  • Further research and clinical validation are expected to solidify the role of CA isozymes in personalized medicine.