FASTA Sequence Extractor

This Python script extracts sequences from a FASTA file based on a list of sequence IDs provided in a text file. It uses the Biopython library for efficient handling of biological data.

Usage

1. Install the required dependencies:

   pip install biopython

2. Run the script:

   python extract_sequences.py input.fasta output.fasta sequence_ids.txt

   • input.fasta: Path to the input FASTA file.
   • output.fasta: Path to the output FASTA file where the extracted sequences will be saved.
   • sequence_ids.txt: File containing sequence IDs to extract, with one ID per line.

Example

python extract_sequences.py example.fasta output.fasta example_ids.txt

This will extract sequences with IDs listed in example_ids.txt from example.fasta and save them to output.fasta.

Requirements

Python 3.x
Biopython library