Reviewing a mechanism figure: pathways, labels and scientific checks

Review scientific meaning before visual polish

Use two reviews for a mechanism figure. The research lead checks entities, relationships, direction and evidence boundaries. The designer then checks hierarchy, label consistency and output files. Attractive arrows are not proof of a valid causal relationship.

This checklist supports diagrams of cell processes, pathways and material interactions. A researcher with the relevant expertise must approve the actual mechanism and terminology.

Prepare an entity–relationship list

For each entity, record its accepted name, abbreviation, location and whether it must appear. For each connection, record its endpoints, meaning and supporting basis. Distinguish observations, literature-supported relationships and interpretations awaiting validation; do not silently depict them all as equally established facts.

Resolve this structure before choosing a two- or three-dimensional rendering style.

Scientific review

Location and orientation

Check compartments, membrane sides, organelles and contacts. Follow each entity across stages: is its name, orientation and location consistent? A transfer between regions should have an understandable path.

The receptor-mediated endocytosis figure helps illustrate a spatial review: extracellular space and cytoplasm are distinct, and internalized ligand is within the vesicle lumen. Explicit regions can communicate more effectively than adding labels without a clear structure.

Arrows and relationships

Inspect both ends of every arrow. Does it indicate sequence, transport, activation, inhibition or association? Define the symbols in a legend rather than assuming a universal interpretation. The research lead decides how an uncertain relationship is represented; visual refinement must not turn it into a confirmed finding.

Names and conditions

Check gene and protein names, species, abbreviations, subscripts, capitalization and necessary units. Review meaning again after language editing. Do not introduce unsupported efficacy statements, numerical changes or applications.

Design and output review

• Leader lines: every line points to the intended object and avoids text or neighboring structures.
• Visual consistency: repeated entities use consistent styling; names, shapes or line patterns supplement color.
• Actual size: inspect labels and arrows at their publication or presentation size.
• Legend: define relevant abbreviations and symbols and reconcile them with the manuscript.
• Exports: reopen the exported files to inspect fonts, cropping, transparency and format.

The Nature research figure guide provides an official starting point for output and accessibility requirements. The target journal's current instructions govern submission.

Close the feedback loop

For each comment, record the location, current content, requested change, reviewer and resolution. “Move the stage 02 leader line to the receptor and have the content lead confirm it” is actionable; “make it more professional” is not an acceptance condition.

Hand over the terminology list, approved version, agreed exports and source-file inventory. Specify the source software and editing scope. Editable two-dimensional labels do not imply that an editable three-dimensional model is included.

Discuss a mechanism figure

An initial inquiry can describe purpose, entity or pathway count, available sketches, style references and deadline without disclosing unpublished research. See scientific illustration services, send a mechanism figure brief, or check the graphical abstract delivery checklist for publication versions.