Analysis of the Budding Yeast Cell Cycle by Flow Cytometry.

Area of Science:

• Cell Biology
• Molecular Biology
• Biotechnology

Background:

• DNA synthesis is a critical event in the cell cycle, distinguishing G1, S, and G2 phases based on genome copy number.
• Accurate measurement of DNA content is essential for understanding cell cycle progression.

Purpose of the Study:

• To present a detailed, scalable protocol for analyzing cell cycle position in Saccharomyces cerevisiae using flow cytometry.
• To establish flow cytometry with Sytox Green as a high-throughput method for DNA content analysis.

Main Methods:

• Utilizing flow cytometry to quantify cellular DNA content after staining with Sytox Green dye.
• Applying the protocol to budding yeast (Saccharomyces cerevisiae) for cell cycle analysis.
• Demonstrating scalability for a wide range of cell inputs and sample numbers.

Main Results:

• Flow cytometry provides rapid, quantitative, cell-by-cell measurements of DNA content and cell cycle position.
• The Sytox Green staining method is effective for high-throughput analysis of yeast cell cycles.
• This technique offers advantages over light microscopy and Coulter analyses for direct DNA content measurement.

Conclusions:

• Flow cytometry with Sytox Green is a robust and scalable method for cell cycle analysis in budding yeast.
• This protocol enables precise measurement of DNA synthesis and cell cycle progression.
• The method is suitable for large-scale studies involving millions of cells.