Cytoplasmic Extract Preparation
Cytoplasmic Extract Preparation - Related Videos
05:58
Xenopus laevis Egg Extract Preparation and Live Imaging Methods for Visualizing Dynamic Cytoplasmic Organization
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Cited by 4 •
2021
We describe a method for the preparation and live imaging of undiluted cytoplasmic extracts from Xenopus laevis eggs.
07:45
Preparation and Fractionation of Xenopus laevis Egg Extracts
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Cited by 7 •
2008
Crude and fractionated Xenopus egg extracts can be used to provide ingredients for reconstituting cellular processes for morphological and biochemical analysis. Egg lysis and differential centrifugation are used to prepare the crude extract which in turn in used to prepare fractionated extracts and light membrane preparations.
03:58
Preparation of Crude Cell Extract from Vibrio natriegens
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2025
Source: Wiegand, D. J., et al. Cell-free Protein Expression Using the Rapidly Growing Bacterium Vibrio natriegens. J. Vis. Exp. (2019).This video demonstrates the preparation of a cell extract from Vibrio natriegens, a rapidly growing bacterium known for its high protein synthesis rate. The bacterial pellet is washed and resuspended in lysis buffer before sonication on ice to prevent cellular degradation. The lysate is centrifuged to separate insoluble cell debris, and the cell extract is...
01:16
Cytoplasm
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2026
The cytoplasm consists of organelles and a framework of protein scaffolds called the cytoskeleton suspended in an aqueous solution, the cytosol. The cytosol is a rich broth of water, ions, salts, and various organic molecules.Protein Folding and MisfoldingThe cytoplasm is the location for several cellular processes, including protein synthesis and folding. The aqueous nature of the cytosol promotes protein folding such that the hydrophobic amino acid side chains are buried in the protein core...
06:29
Preparation of Cytoplasmic and Nuclear Long RNAs from Primary and Cultured Cells
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Cited by 3 •
2023
The present protocol offers an efficient and flexible method to isolate RNA from nuclear and cytoplasmic fractions using cultured cells, and then validate using qPCR. This effectively serves as a replacement for other RNA preparation kits.
FAQs
Controlled lysis is the critical balance in Cytoplasmic Extract Preparation. The plasma membrane must be disrupted enough to release soluble cytoplasmic contents, yet gently enough to preserve the components selected for analysis. If lysis is poorly controlled, the resulting fraction may not accurately represent cellular function or composition.
Centrifugation provides the separation step that makes the extract analytically useful. After lysis, intact cells, nuclei, membranes, and other insoluble debris can be removed from the soluble material, leaving a cytoplasmic supernatant for downstream analysis. This fractionation reduces unwanted cellular material and helps associate measured biochemical signals with cytoplasmic components.
Temperature control helps preserve extract composition during handling. Because the goal is to maintain desired cellular components, processing conditions should limit changes that could compromise the soluble fraction before analysis. Careful control of temperature, together with suitable lysis and fractionation conditions, supports reliable measurements of enzyme activity, protein abundance, signaling pathways, and other cytoplasmic factors.
A basic workflow begins with controlled disruption of the plasma membrane, followed by centrifugation of the lysed material. The centrifugation step removes intact cells, nuclei, membranes, and insoluble debris, while the supernatant is retained as the working fraction. Researchers then use that fraction for biochemical or molecular measurements, depending on the question.
These extracts support several complementary analyses, including measurements of enzyme activity, assessment of protein abundance, and investigation of signaling pathways. They can also help researchers examine cytoplasmic factors directly. Because the soluble fraction is separated from major insoluble materials, it provides a practical basis for studying biochemical and molecular features of cellular function.
The soluble cytoplasmic fraction can provide the cellular components needed for biochemical reactions outside an intact cell. This makes it useful for cell-free experiments that examine cytoplasmic activities under controlled conditions. Such experiments extend measurements of enzymes, proteins, signaling-related factors, and other soluble components beyond analyses performed within whole cells.