Sequence analysis
Peptide Molecular Weight Calculator
Calculate theoretical neutral monoisotopic mass, common protonated m/z values, sequence length and amino-acid composition from a one-letter peptide sequence.
Open Calculator Free research utilities
Laboratory tools designed to make analytical research work easier to review.
Practical, shareable utilities for peptide sequence notation, molecular calculations, and analytical-documentation review, with clear assumptions and research-use-only boundaries.
Sequence notation
Amino Acid Sequence Converter
Convert peptide sequences between standard one-letter and three-letter amino-acid notation, review residue names, and copy formatted output for laboratory documentation.
Open ConverterDocumentation review
Peptide COA Review Checklist
Review whether a Certificate of Analysis contains core lot identifiers, dates, analytical evidence and traceability fields. The score measures documentation completeness only.
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