Related Experiment Video
Updated: Jan 21, 2026

Correlative Microscopy for 3D Structural Analysis of Dynamic Interactions
Published on: June 24, 2013
Correlation Between Radiosensitizing Activity and the Stereo-structure of the TX-2036 Series of Molecules
Kazuto Ohkura1, Atsushi Tabata2, Yoshihiro Uto2
1Graduate School of Pharmaceutical Sciences, Suzuka University of Medical Science, Suzuka, Japan kohkura@suzuka-u.ac.jp.
Background/Aim:
The stereo-configuration (R-, S-configuration) of chiral-2-nitroimidazole derivatives alters their radiosensitizing activity. This study aimed at examining the molecular features of these enantiomers by molecular simulation techniques.
Materials And Methods:
A series of 2-nitroimidazole-based radiosensitizer TX-2036 molecules were synthesized, and their profiles were examined using molecular structural analysis such as conformation analysis, molecular orbital analysis, and electrostatic potential analysis.
Results:
R-configured TXs (TX-2043, -2030, -2036) had a weaker radiosensitizing activity than S-configured TXs (TX-2044, -2031, -2037), and R-compounds had a small minus electrostatic potential (ESP) field in the cyclopentene-1,3-dione region. S-configured TX-2046 had weaker radiosensitizing activity than R-configured TX-2045, and TX-2046 had a small minus ESP field as well as R-configured TX-2043, -2030, - 2036.
Conclusion:
The cyclopentene-1,3-dione involved in the small minus ESP field affected the radiosensitizing activity of the TX-2036 series of molecules.
More Related Videos
Related Concept Videos
Correlations
Correlation and Causation
Correlation versus Causation
If the dependent variable increases or decreases when the independent variable increases, there is a positive or negative...
Resistors In Series
In a series circuit, the...
Correlation
Two variables, for example, a and b, are said to be positively correlated if both variables move in the same direction. In other words, a positive correlation exists between two variables, a and b, if:
Series Resonance
Structure-Activity Relationships and Drug Design
SAR studies the intricate relationship between a drug's chemical structure and biological activity. It focuses on understanding how modifications to a drug's structure can influence...

