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A sequence of interactions or steps representing processes, commonly used to model biological mechanisms or operational flows.
DESCRIPTION
Pathways describe chains of interactions among entities, such as molecules in cells or tasks in business processes. In biology, pathways clarify mechanisms leading to specific cellular outcomes. Curated pathway databases enable analysis, enrichment, and visualization of complex networks. In process modeling, pathways resemble workflows or DAGs that guide operational steps. Clear pathway modeling aids causal reasoning, simulation, and decision support.
ALTERNATIVE DEFINITIONS
MedlinePlus Genetics
A pathway is a series of actions among molecules in a cell that leads to a certain product or change in the cell.
Emphasizes molecular interactions and cellular outcomes in genetics.
KEGG
KEGG PATHWAY is a collection of manually drawn pathway maps representing knowledge on the molecular interaction and reaction networks for metabolism, genetic information processing, environmental information processing and cellular processes.
Presents curated maps covering diverse molecular processes and interactions.
Reactome
Reactome is a free, open-source, curated and peer reviewed pathway database that provides intuitive bioinformatics tools for the visualization, interpretation and analysis of pathway knowledge.
Highlights peer review and analytical tooling for pathway exploration.
RELATED TERMS
Process Model Graph Interaction Network Causal Chain Knowledge Graph Systems Biology Directed Acyclic Graph KEGG Reactome
COMPETING TERMS
KNOWLEDGE AREAS
Semantic & Knowledge Modeling Domain & Business Context Data Science
TARGET AUDIENCE
Data Scientist Information Analyst Data Modeler AI Engineer Data Architect
EXTERNAL SOURCES
- Wikipedia - Pathway (biology)
- KEGG - Comprehensive pathway resources
- Reactome - Curated pathway database
TOP QUESTIONS
How is a Pathway used in bioinformatics analysis?
Researchers perform enrichment and network analysis to identify pathways significantly impacted by gene expression or variants.
Category: Example
What is the difference between a Pathway and a Workflow?
A pathway models interactions and mechanisms, often biological; a workflow models ordered tasks and execution steps in operations.
Category: Misunderstanding
Why are curated Pathway databases important?
They provide vetted, consistent representations of complex processes, enabling reproducible analysis and cross-study comparisons.
Category: Relevancy
What risks exist when interpreting Pathway results?
Bias from incomplete curation, context mismatch, and over-interpretation can mislead conclusions; validation and domain expertise mitigate risks.
Category: Risk
How do Pathways relate to Knowledge Graphs?
Pathways can be encoded as graph structures linking entities and interactions, supporting causal queries and visual exploration.
Category: Overview
What are common mistakes in Pathway modeling?
Ignoring directionality, context (cell type, conditions), and provenance leads to inaccurate or non-generalizable models.
Category: Mistakes
Which tools support Pathway visualization?
Reactome, Cytoscape, and KEGG provide visual maps and analysis tools for pathway exploration.
Category: Platform
How are Pathways used in drug discovery?
They help identify intervention points, off-target effects, and predict downstream impacts of compounds on biological processes.
Category: Example
How do Pathways translate to process engineering?
They analogize to DAGs or process diagrams mapping steps, dependencies, and outcomes for optimization and monitoring.
Category: Analogy