gc-content-analyzer app

A Shiny web application to analyze DNA sequences for GC content and nucleotide composition (A, T, G, C).
Upload a FASTA file or paste a sequence to instantly visualize and download results.

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Features

• Upload multi-sequence FASTA files or paste a DNA string
• Calculate GC content and base percentages for each sequence
• Visualize nucleotide composition via interactive bar plots
• Export summary data to CSV
• Download selected sequences GC content

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App Preview

🔹 Main Interface

🔹 Nucleotide Composition Plot

🔹 Summary Table

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Try It Out

1. Clone the repo or download it as a .zip

2. Open GC_Content_analyser.R in RStudio

3. Run the app with:

   shiny::runApp()

4. Upload a FASTA file or paste a DNA sequence

5. Explore GC content, view base composition plots, and download results

6. You can test the app using the included sequence.fasta file (tracked via Git LFS)

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📚 Dependencies

# Install Biostrings from Bioconductor
if (!requireNamespace("BiocManager")) install.packages("BiocManager")
BiocManager::install("Biostrings")

# Install required CRAN packages
install.packages(c("shiny", "ggplot2", "DT", "bslib"))

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📄 License

MIT License — see LICENSE

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👤 Author

Naga Sai Sarada Priya Mandala

If you found this useful, feel free to ⭐ the repo or share it!

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