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Related Concept Videos

Subcellular Fractionation01:32

Subcellular Fractionation

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The homogenate obtained after cell lysis contains various membrane-bound organelles that can be further separated into pure fractions by subcellular fractionation. These isolates are used to study specific cellular components, analyze localized protein activity, and are even employed in diagnostics. Fractionation is typically achieved using centrifugation methods, the most common being density-gradient and differential centrifugation.
Differential Centrifugation
Differential centrifugation is...
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Partial Fractions01:28

Partial Fractions

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A partial fraction is a component of a rational expression represented as the sum of simpler fractions. When a rational function is expressed as a ratio of two polynomials, it can often be decomposed into a sum of fractions whose denominators are simpler polynomials, typically linear or irreducible quadratic factors. This process is called partial fraction decomposition, and it is used to simplify complex expressions for integration, solving equations, or analysis.Partial fraction decomposition...
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Unless individual gases chemically react with each other, the individual gases in a mixture of gases do not affect each other’s pressure. Each gas in a mixture exerts the same pressure that it would exert if it were present alone in the container. The pressure exerted by each individual gas in a mixture is called its partial pressure.
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Integration of Rational Functions Using Partial Fractions

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Rational functions are expressions written as the ratio of two polynomials, and their integrals are evaluated by simplifying the integrand into manageable parts. These functions are classified as proper or improper based on the degrees of the numerator and denominator.A rational function is proper when the degree of the numerator is less than the degree of the denominator. In this case, partial fraction decomposition is used to rewrite the function as a sum of simpler rational terms. The...
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Inverse z-Transform by Partial Fraction Expansion01:20

Inverse z-Transform by Partial Fraction Expansion

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The inverse z-transform is a crucial technique for converting a function from its z-domain representation back to the time domain. One effective method for finding the inverse z-transform is the Partial Fraction Method, which involves decomposing a function into simpler fractions with distinct coefficients. These fractions correspond to known z-transform pairs, facilitating the inverse transformation process.
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In pharmacotherapy, monitoring drug concentrations is paramount, especially for drugs whose therapeutic effects hinge on both the active compound and its metabolite. Hepatic impairment profoundly influences drug potency by altering liver function. If the drug is more potent than its metabolite, impaired liver function amplifies drug activity due to elevated drug concentration levels. Conversely, if the metabolite holds greater potency, diminished liver function diminishes drug activity by...
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Related Experiment Video

Updated: Feb 4, 2026

Subcellular Fractionation from Fresh and Frozen Gastrointestinal Specimens
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Euglena gracilis Subcellular Fractionation.

Lucia Tomečková1, Vladimír Hampl1, Priscila Peña-Diaz2

  • 1Department of Parasitology, Faculty of Science, Charles University, BIOCEV, Vestec, Czech Republic.

Methods in Molecular Biology (Clifton, N.J.)
|February 2, 2026
PubMed
Summary
This summary is machine-generated.

Subcellular fractionation of Euglena gracilis uses sucrose and iodixanol gradients. These methods aid organelle separation but do not achieve complete purification.

Keywords:
EuglenaGradientsIsopycnic centrifugationOrganelle isolationSubcellular distributionSubcellular fractionation

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Area of Science:

  • Cell Biology
  • Biochemistry

Background:

  • Subcellular fractionation of Euglena gracilis is a long-standing technique.
  • Method development is driven by the need for specific organelle isolation.

Purpose of the Study:

  • To describe a specific approach to subcellular fractionation in Euglena gracilis.
  • To discuss insights gained from the fractionation process.

Main Methods:

  • Utilized sucrose gradients for organelle separation.
  • Employed iodixanol gradients for organelle separation.

Main Results:

  • Sucrose and iodixanol gradients were used to separate major organelles.
  • These gradient methods alone did not result in complete organelle purification.

Conclusions:

  • The described fractionation methods are valuable but require further refinement for complete purification.
  • Further optimization is needed to achieve highly pure organelle fractions from Euglena gracilis.