dyebias

dyebias corrects gene-specific dye bias (GSDB) in two-channel DNA microarray experiments by applying Gene- And Slide-Specific Correction (GASSCO) that uses sequence-specific adjustments modulated by the overall dye bias of individual hybridizations.

Key Features:

• GASSCO systematic correction: Provides gene- and slide-specific correction that addresses both gene-specific and slide-specific dye biases.
• Sequence-specific adjustments: Applies sequence-specific adjustments that are modulated by the overall dye bias observed in individual hybridizations and account for variations in label incorporation efficiency.
• Predictive modeling: Uses a sequence-based model to predict which probes are most susceptible to GSDB, informing probe design and interpretation.
• Cross-platform validation: Validated on various publicly available datasets across different microarray platforms and organisms, including ChIP-on-chip experiments.

Scientific Applications:

• Gene expression analysis: Improves accuracy and reproducibility of gene expression measurements from two-channel microarrays by correcting GSDB.
• DNA–protein interaction studies (ChIP-on-chip): Reduces dye bias in ChIP-on-chip experiments to improve detection of DNA–protein interactions.
• Probe design optimization: Informs selection and design of probes by identifying those most susceptible to GSDB.

Methodology:

Implements Gene- And Slide-Specific Correction (GASSCO) using sequence-specific adjustments modulated by hybridization-level dye bias, employs a sequence-based predictive model for probe susceptibility, and has been validated on publicly available microarray datasets.