Cell cycle analysis of budding yeast using SYTOX Green

Area of Science:

• * Molecular Biology
• * Cell Biology
• * Biotechnology

Background:

• * Flow cytometry is a key technique for analyzing the cell cycle of Saccharomyces cerevisiae by measuring DNA content.
• * Traditional methods often use propidium iodide (PI) for DNA staining, which can be subject to experimental variability.

Purpose of the Study:

• * To evaluate SYTOX Green as a superior alternative to propidium iodide (PI) for DNA content analysis in budding yeast.
• * To determine if SYTOX Green enhances the accuracy and reproducibility of cell cycle analysis compared to PI.

Main Methods:

• * Standard ethanol fixation protocol for Saccharomyces cerevisiae.
• * DNA staining using SYTOX Green.
• * DNA staining using propidium iodide (PI) as a control.
• * Flow cytometric analysis of stained cells to determine DNA content and cell cycle phase.

Main Results:

• * SYTOX Green staining resulted in improved coefficients of variation (CVs) compared to PI.
• * A better correlation between DNA content and fluorescence intensity was observed with SYTOX Green.
• * SYTOX Green demonstrated decreased sensitivity to experimental condition variances versus PI.

Conclusions:

• * SYTOX Green offers a more accurate and reliable method for budding yeast cell cycle analysis than PI.
• * This improved protocol enhances the precision of DNA content determination in Saccharomyces cerevisiae.
• * The SYTOX Green protocol is recommended for researchers seeking robust cell cycle analysis.