GC Content Analyzer Tutorial

This tutorial will guide you through using a Python script to calculate the GC content of a DNA sequence. GC content is the percentage of bases in a DNA sequence that are either Guanine (G) or Cytosine (C).

Step 1: Download the Script

Download the Python script gc_content_analyzer.py from the link below:

Download gc_content_analyzer.py

Step 2: Run the Script

Open a terminal or command prompt and navigate to the directory where the script is saved. Run the script using the following command:

python3 gc_content_analyzer.py

Step 3: Input a DNA Sequence

The script will prompt you to enter a DNA sequence. Type or paste your sequence and press Enter. For example:

> ATGCGATCGATCGTAGCTAGCTAGCTAG

The script will calculate and display the GC content of the sequence.

Step 4: Exit the Program

To exit the program, type exit and press Enter.

Example Output

Here’s an example of what the output might look like:

GC Content Analyzer
-------------------
Enter a DNA sequence (or 'exit' to quit):
> ATGCGATCGATCGTAGCTAGCTAGCTAG
GC Content: 50.00%
> exit
Exiting the program. Goodbye!

How It Works

The script uses a simple function to count the number of G and C bases in the sequence and calculates the percentage of GC content. It also includes input validation to ensure the sequence contains only valid DNA bases (A, T, C, G).

Contributing

If you'd like to contribute to this project, feel free to fork the repository and submit a pull request. You can also report issues or suggest improvements.