Filter Protein

Clean protein sequences by removing non-amino acid characters, spaces, and digits. Supports standard 20 amino acids and extended codes.

Allowed Characters

Standard 20 amino acids
Standard 20 + * (stop)
All letters + * . -

Replace Invalid With

Remove (delete)
Replace with X
Replace with -

Case Conversion

Uppercase
Lowercase
Keep original

Remove Options

Remove spaces
Remove digits
Remove line breaks

What is Filter Protein?

Filter Protein removes non-amino acid characters from protein sequences, ensuring clean data for structural and functional analysis. Supports standard amino acids and extended codes.

How to Use This Filter Protein Tool

Clean your protein sequences instantly:

  1. Paste or upload your protein sequences
  2. Choose allowed amino acids
  3. Select replacement or removal options
  4. Results filter automatically as you type

When to Use

This tool is useful when you need to:

  • Clean protein sequences from databases
  • Remove numbers and special characters
  • Standardize sequences for alignment
  • Prepare data for structure prediction

Example Input

Protein with numbers and spaces:

1 MEK VNE 123 ERD
41 AVF @#$ EDH IGD

Try with the Example button.

Example Output

Cleaned sequence:

MEKVNEERDAVFEDHIGD

Non-protein characters removed.

FAQ

Q: What are the standard 20 amino acids?
A: A, C, D, E, F, G, H, I, K, L, M, N, P, Q, R, S, T, V, W, Y

Q: Does it preserve FASTA headers?
A: Yes, lines starting with > are preserved.