A confidence interval for mutant frequency in assays using microtiter wells

Area of Science:

• Biostatistics
• Molecular Biology
• Assay Development

Background:

• Estimating the mutant fraction is crucial in various biological assays.
• Existing confidence intervals for mutant fractions often overlook early-stage experimental variability.
• Microtiter well assays are widely used but susceptible to early growth and dilution variances.

Purpose of the Study:

• To develop a more accurate confidence interval for mutant fraction estimation.
• To incorporate the impact of early growth and dilution steps into statistical analysis.
• To enhance the reliability of results from microtiter well-based assays.

Main Methods:

• Derivation of a novel statistical model for confidence interval calculation.
• Inclusion of variance components from cell growth and serial dilutions.
• Application of the derived interval to simulated and experimental data.

Main Results:

• The new confidence interval provides a more comprehensive assessment of uncertainty.
• Variability from early growth and dilution significantly impacts mutant fraction estimates.
• The proposed method demonstrates improved precision compared to existing approaches.

Conclusions:

• The derived confidence interval offers a statistically robust method for mutant fraction analysis.
• Accounting for early-stage variability is essential for accurate assay interpretation.
• This work provides a valuable tool for researchers in molecular biology and genetics.