Membrane Preparation
Membrane Preparation - Related Videos
04:57
On-Membrane Protein Digestion to Prepare Co-Immunoprecipitated Proteins for Interaction Studies
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2025
This video demonstrates co-immunoprecipitated protein complexes on a PVDF membrane for protein-protein interaction analysis. The reduced proteins from complexes were treated with trypsin to cleave the individual proteins at the smaller peptides, then, the remaining peptides were extracted from the PVDF membrane. The pulled peptide derived from both proteins in the complex was then dried and resuspended in a low concentration of formic acid for further analysis.
12:00
Preparation of Light-responsive Membranes by a Combined Surface Grafting and Postmodification Process
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Cited by 3 •
2014
A plasma-induced polymerization procedure is described for the surface-initiated polymerization on polymer membranes. Further postmodification of the grafted polymer with photochromic substances is presented with a protocol of conducting permeability measurements of light-responsive membranes.
04:39
Preparation of Fixed Drosophila Oocytes for Immunostaining: A High-Throughput Method to Fix and Remove the Outer Membrane
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2023
Immunostaining of Drosophila late-stage oocytes can prove challenging due to the oocytes' surrounding membranes. This video describes a high-throughput method for obtaining oocytes, their fixation, and membranes' removal for immunostaining. The featured protocol demonstrates these techniques with late-stage oocytes used to visualize different stages of meiosis.
20:21
Use of a Robot for High-throughput Crystallization of Membrane Proteins in Lipidic Mesophases
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Cited by 47 •
2012
Herein is described a robotic approach to high-throughput crystallization of membrane proteins in lipidic mesophases for use in structure determination using macromolecular X-ray crystallography. Three robots capable of handling the viscous and sticky protein-laden mesophase integral to the method are introduced.
22:00
Crystallizing Membrane Proteins for Structure Determination using Lipidic Mesophases
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Cited by 48 •
2010
Herein is described the procedure implemented in the Caffrey Membrane Structural and Functional Biology Group to set up manually crystallization trials of membrane proteins in lipidic mesophases.
FAQs
Mechanical homogenization disrupts tissue or cultured cells, producing membrane fragments along with soluble cellular contents. Centrifugation then separates these components into fractions based on their physical behavior, allowing membrane-associated material to be collected apart from soluble components. This separation creates a more controlled sample for examining receptors, transporters, lipids, and membrane proteins without the full complexity of intact cells.
Buffer composition and temperature help preserve membrane structure and the activity of membrane-associated proteins during processing. Conditions that are poorly controlled can reduce the reliability of downstream measurements, especially when assays depend on functional receptors or transporters. Maintaining appropriate handling conditions therefore supports consistent biochemical analysis and helps ensure that observed results reflect the sample rather than preparation-related damage.
Washing helps reduce residual soluble components and other material carried into the collected membrane fraction during separation. Resuspension then places the membranes into a suitable buffer for subsequent analysis. Together, these steps improve sample consistency and provide a preparation compatible with biochemical assays, receptor-binding studies, transporter analysis, and investigations of membrane-associated signaling.
The procedure concentrates cellular membranes in a fraction that can be examined under defined experimental conditions. Researchers can then assess membrane-associated receptors and transporters without relying on the complete cellular environment. This controlled format is useful for biochemical assays and receptor-binding studies, where the composition and handling of the membrane sample influence the reliability of measurements.
A typical workflow begins with mechanical disruption of the tissue or cultured cells, followed by centrifugation to separate membrane material from soluble components. The collected fraction is washed and resuspended in a suitable buffer before analysis. Careful handling throughout the workflow is important because preserving membrane structure and protein activity affects the quality of the resulting preparation.
Neuronal communication depends on membrane-associated components, including receptors and transporters that can be examined in isolated fractions. Membrane preparations therefore provide material for studying synaptic signaling under controlled conditions. They also support investigations of neurological disease mechanisms by enabling biochemical and binding analyses focused on membrane lipids and proteins rather than on soluble cellular contents alone.