Cell Reports Formatting Requirements: Complete Author Guide

Cell Reports uses a short, unstructured abstract. This is simpler than many journals in the Cell Press family.

• Word limit: 150 words maximum
• Structure: Single paragraph, no subheadings
• Citations: Not allowed
• Highlights: Cell Reports requires 3-4 bullet-point "Highlights" in addition to the abstract

The 150-word abstract is tight. State the problem, the approach, the main finding, and the implication. That's it. Don't waste words on general background.

Highlights are a Cell Press feature that appears on the article landing page:

• 3-4 bullet points
• Each bullet is one sentence, maximum 85 characters
• Written in third person ("This study shows..." not "We show...")
• Must convey the paper's main findings without jargon

Highlights are more important than many authors realize. They're prominently displayed on the article page and are often what readers see first when browsing. Good Highlights are specific and results-focused. Bad Highlights are vague statements about the field.

Good Highlight: "Single-cell sequencing reveals 12 previously uncharacterized astrocyte subtypes in the human cortex"

Weak Highlight: "This study provides insights into brain cell diversity"

Cell Press pioneered the graphical abstract, and while it's not technically mandatory at Cell Reports, it's strongly recommended. The vast majority of published Cell Reports papers include one.

Graphical abstract specifications:

• Dimensions: 1,200 x 1,200 pixels (square format)
• File format: TIFF, EPS, or PDF
• Font: Arial, minimum 12 pt
• Text: Minimal, the image should communicate visually
• Content: Should summarize the paper's main finding or workflow

The graphical abstract appears on the table of contents page and the article landing page. It's the visual that represents your paper across social media, email alerts, and journal browsing. Investing time in a clear, attractive graphical abstract directly affects how many people click through to read your paper.

Cell Press provides graphical abstract guidelines with examples of effective and ineffective designs. The most common mistake is cramming too much text into the square format. Treat it like a poster, not a figure legend.

Cell Reports allows up to 7 main figures, which is slightly fewer than some comparable journals. Tables count separately.

Figure specifications:

Table requirements:

• Tables should be editable (created in Word, not as images)
• Every column must have a header row
• Use minimal horizontal rules
• No vertical lines
• Cell Reports tables support color shading for readability
• Large tables (more than one page) should move to supplemental

Supplemental figures and tables: There's no strict cap on supplemental items. However, Cell Press editors have increasingly pushed back on papers where the supplement dwarfs the main article. If you have 7 main figures and 25 supplemental figures, reviewers will question whether the main figures tell a clear enough story.

Multi-panel figures: Common at Cell Reports. Panels A-G in a single figure are normal. Each multi-panel figure counts as one figure toward the 7-figure limit. Cell Press requires that panels be labeled with uppercase bold letters and arranged in a logical reading order (left to right, top to bottom).

Cell Reports uses the Cell Press author-date citation style. This is fundamentally different from numbered citation systems used by Nature, Science, and many medical journals.

In-text citations: Parenthetical author-date format.

• One author: (Smith, 2024)
• Two authors: (Smith and Jones, 2024)
• Three or more: (Smith et al., 2024)
• Multiple citations: (Smith et al., 2024; Jones et al., 2023), listed chronologically

Reference list format:

Smith, A.B., Jones, C.D., and Williams, E.F. (2024). Title of article in sentence case. Cell Rep. 43, 114567.

Key formatting details:

• Reference list is alphabetical by first author's last name, not numbered
• Author names: Last name, initials with periods (e.g., "Smith, A.B.")
• Use "and" before the last author (not "&")
• Year in parentheses after the author list
• Journal names are abbreviated according to standard conventions
• Volume number in bold
• Article number or page range follows the volume
• DOIs aren't required in the reference list but are encouraged

Common mistake: Authors switching from a numbered citation journal forget to change to author-date format. If your manuscript has superscript numbers instead of (Author, Year) citations, it will be returned for reformatting. Most reference managers have a "Cell" style that handles this correctly.

There's no hard reference cap. Most Articles have 50-80 references. Reviews can have 100+.

STAR Methods is the defining feature of Cell Press formatting. It stands for Structured, Transparent, Accessible Reporting, and it replaces the traditional Methods section with a standardized format.

STAR Methods appear at the end of the paper (after Acknowledgments and Author Contributions, before references in the manuscript file). They're organized under these mandatory headings:

1. Resource Availability

• Lead contact: Name and email of the person responsible for reagent and resource requests
• Materials availability: Statement about whether materials generated in the study are available
• Data and code availability: Where data and code are deposited, with accession numbers and DOIs

2. Experimental Model and Study Participant Details

• Cell lines, animal models, patient cohorts
• For human studies: demographics, consent, IRB approval
• For animal studies: species, strain, age, sex, housing conditions

3. Method Details

• Detailed experimental procedures for all techniques used
• This is the equivalent of the traditional Methods section

4. Quantification and Statistical Analysis

• Statistical methods, software used, sample sizes, significance thresholds
• Must be specific: "Two-tailed Student's t-test" not just "statistical analysis"

Key Table: Key Resources Table

STAR Methods must include a Key Resources Table listing all reagents, antibodies, cell lines, software, and other resources used in the study. Each entry includes the resource name, source, and identifier (catalog number, RRID, etc.).

This Key Resources Table is one of the most time-consuming parts of a Cell Reports submission. Start building it early. Tracking down catalog numbers and RRIDs for every reagent, antibody, and software tool takes longer than most authors expect.

Cell Reports supplemental material is published online alongside the article and is peer-reviewed.

Supplemental items include:

• Supplemental figures (Figure S1, Figure S2, etc.)
• Supplemental tables (Table S1, Table S2, etc.)
• Supplemental videos (Video S1, Video S2, etc.)
• Data files (Data S1, Data S2, etc.)

Formatting rules:

• All supplemental figures and tables go into a single PDF titled "Supplemental Information"
• Videos and large data files are uploaded separately
• Supplemental figure legends go at the end of the supplemental PDF, not in the main manuscript
• In the main text, cite supplemental items as "Figure S1" (not "Supplementary Figure 1")

Data deposition: Cell Press requires that all genomics, proteomics, and structural data be deposited in public repositories. Accession numbers must be listed in the STAR Methods Resource Availability section.

Title page requirements:

• Full title
• All author names with affiliations (numbered superscripts)
• Lead contact designation (name and email)
• Author contributions (using CRediT taxonomy or free text)
• Declaration of interests
• Word count

Cover letter should include:

• Why the work fits Cell Reports' scope
• The paper's main advance and significance
• Confirmation that the work isn't under consideration elsewhere
• Suggested and excluded reviewers

Cell Press transfer system: If your paper was rejected from Cell, Molecular Cell, or another Cell Press journal, you can transfer your manuscript (including reviews) to Cell Reports. Mention this in the cover letter. Transferred manuscripts often receive expedited review.

Highlights are mandatory. Not optional, not recommended. Cell Reports requires 3-4 Highlights with each submission.

In Brief summary. Cell Reports publishes a brief "In Brief" description written by the editorial team. You don't write this, but it's useful to know it exists. It appears on the article landing page above your abstract.

eTOC Blurb. Authors must provide a 40-word "eTOC blurb" summarizing the paper for the electronic table of contents. This is different from the Highlights and the abstract.

Author contributions use CRediT taxonomy. Cell Press adopted the CRediT (Contributor Roles Taxonomy) system. Each author's contribution is described using standardized terms: Conceptualization, Methodology, Investigation, Writing - Original Draft, Writing - Review & Editing, Supervision, Funding Acquisition, etc.

ORCID iDs. Required for the corresponding author. Encouraged for all authors.

Preprints. Cell Reports allows preprint posting on bioRxiv or medRxiv. Disclose the preprint DOI in the manuscript.

Data availability. Mandatory statement in STAR Methods. All data must be accessible, either in the paper, supplement, or a public repository.

1. Key Resources Table takes hours. Don't leave it for the last minute. Every antibody, cell line, chemical, software tool, and dataset needs a source and identifier.

1. Highlights must be under 85 characters each. This is strictly enforced. Count your characters.

1. eTOC blurb is separate from everything else. It's 40 words, summarizing the paper's main point. Don't confuse it with the abstract or Highlights.

1. Figure citations must be sequential. Don't cite Figure 3 before Figure 2 in the text.

1. STAR Methods headings are mandatory. You can't rename them or skip sections. Even if your paper doesn't involve animal models, include the "Experimental Model and Study Participant Details" heading with "N/A" if needed.

1. Line numbers and double spacing. Required for the review manuscript.