University of Tokyo Researchers Use Raman Spectroscopy to Nondestructively Map Cellular Proteome Structures

University of Tokyo researchers use Raman spectroscopy to analyze protein coordination in living cells, offering new potential for early disease detection.

By: AXL Media

Published: Apr 28, 2026, 9:26 AM EDT

Source: Information for this report was sourced from EurekAlert!

Optical Innovation Bypasses Destructive Cellular Analysis

Scientists led by Professor Yuichi Wakamoto at the University of Tokyo have pioneered a method to observe the internal molecular machinery of cells using scattered light. Traditionally, quantifying the abundance of proteins required a process called proteomics, which involves extracting proteins and effectively destroying the cell. This new approach utilizes Raman spectroscopy to infer cellular proteome profiles nondestructively, allowing researchers to peer into the life of a cell while keeping its biological functions intact.

A Foundation in Global Protein Coordination

The research team, including Project Researcher Ken-ichiro F. Kamei, sought to understand why light measurements could accurately reflect a cell’s complex protein makeup. Their investigation revealed that protein abundance ratios are not random but globally coordinated across various environmental conditions. This discovery suggests that the internal chemistry of a cell follows a predictable pattern of organization that can be captured through the specific signatures of scattered light.

Stability and Flexibility Through Stoichiometry Conservation

A distinct hierarchical structure emerged from the data, showing a large core of proteins that maintain consistent ratios to support essential life functions. While this core provides a baseline of stability, smaller groups of proteins fluctuate in response to external changes, granting the cell the flexibility needed to survive in new environments. This balance, termed stoichiometry conservation, explains how biological systems remain resilient yet responsive to the world around them.