This script is designed to process files in multi-FASTA format, extracting individual FASTA content blocks.

Usage: Place this script in the root directory containing your FASTA files and execute it from the command line.

Functionality:

• Line 2: Searches recursively for FASTA files in all directory trees.
• Line 4: Counts the number of sequence headers in each FASTA file.
• Line 5: Process files if they contain more than one sequence (multi-FASTA).
• Line 6-8: Sets up file and directory names for processing.
• Line 9-11: Creates a new directory for each multi-FASTA file if it doesn't exist.
• Line 12: Extracts each sequence from the multi-FASTA file, saving it as an individual FASTA file in the newly created directory.
• Line 13: Outputs the completion status with the path of the processed file.

To give execute permission:

chmod +x multifasta_to_fasta.sh

Run:

./multifasta_to_fasta.sh