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The high insolubility of some precipitates can result in an unfavorable relative supersaturation. This can lead to colloidal particles with a large surface-to-mass ratio, where adsorption is promoted. For instance, in the precipitation of silver chloride, silver ions are adsorbed on the surface of the colloidal particles, forming a primary layer. This layer attracts ions of opposite charge (such as nitrate ions), forming a diffuse secondary layer of adsorbed ions. This electric double layer...
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Supercritical fluid chromatography (SFC) provides a beneficial substitute for gas chromatography (GC) and liquid chromatography (LC) for certain samples because it merges the top attributes of both techniques. SFC allows the separation and analysis of compounds that GC or LC does not easily manage. These compounds are traditionally nonvolatile or thermally unstable, making GC unsuitable and lacking functional groups required for HPLC analysis.
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Updated: Sep 23, 2025

Phase Diagram Characterization Using Magnetic Beads as Liquid Carriers
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Post-translational modifications in liquid-liquid phase separation: a comprehensive review.

Jingxian Li1, Mengdi Zhang2, Weirui Ma1

  • 1MOE Laboratory of Biosystems Homeostasis & Protection and Innovation Center for Cell Signaling Network, Life Sciences Institute, Zhejiang University, Hangzhou, 310058, China.

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Summary
This summary is machine-generated.

Liquid-liquid phase separation (LLPS) is crucial in biology, but its physical mechanisms are understudied. This review highlights the role of protein properties and post-translational modifications (PTMs) in regulating LLPS.

Keywords:
Liquid-liquid phase separationNeurodegenerative diseasesPoly (ADP-ribosyl)ationPost-translational modifications

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Area of Science:

  • Biochemistry and Biophysics
  • Cell Biology

Background:

  • Liquid-liquid phase separation (LLPS) describes biomolecular condensation into liquid-like droplets, impacting cellular organization.
  • LLPS is increasingly recognized for roles beyond membraneless organelles, including compartmentalization and reaction regulation.
  • Current research often emphasizes physiological significance over the underlying physical mechanisms of LLPS.

Purpose of the Study:

  • To review the physical mechanisms driving LLPS, focusing on protein characteristics.
  • To explore the underappreciated role of post-translational modifications (PTMs) in regulating LLPS.
  • To identify potential connections between PTMs and LLPS for future research.

Main Methods:

  • Literature review of LLPS driving forces and protein secondary structures.
  • Summary and analysis of existing studies on PTMs regulating LLPS.
  • Speculative analysis of unreported PTMs impacting phase separation.

Main Results:

  • LLPS is governed by biomolecular solubility limits, forming distinct liquid droplets.
  • Protein side-chain characteristics and interactions are key regulators of LLPS.
  • Post-translational modifications (PTMs) are critical for electrostatic balance and LLPS regulation, though often underestimated.

Conclusions:

  • A deeper understanding of LLPS physical mechanisms requires attention to protein properties and PTMs.
  • PTMs play a significant, yet often overlooked, role in modulating LLPS.
  • Further investigation into specific PTMs could reveal novel insights into LLPS regulation.