Peptide Sequence Analyzer
Review a peptide sequence and its basic properties in one report. See the normalized sequence, length, residue counts and percentages, and both neutral molecular masses. Copy the complete report as TSV when you need to keep the sequence and results together.
Results
Enter a valid sequence to see results.
How the report is calculated
The parser separates a FASTA header from the sequence and normalizes accepted letters to uppercase. The analyzer then applies the same composition and molecular weight calculations as the standalone tools.
Read the calculation method →Worked example
ACD
Three residues. A, C, and D occur once each (33.3333% each). Average mass 307.3214 Da. Monoisotopic mass 307.0838 Da.
Limitations
- One neutral, linear, unmodified chain with free N- and C-termini. Cysteines are modeled without disulfide bonds.
- The report summarizes properties calculated directly from the sequence. For a separate estimate of pI, use the isoelectric point calculator.