Peptide sequence analyzer
See what your sequence is made of.
One-letter codes for the 20 standard amino acids. Spaces and hyphens are ignored.
Calculated locally in your browser.
Your sequence, connected
N-terminusC-terminus
Enter a sequence, or try the example.
Select a residue to explore its identity.
Sequence schematic — not a predicted 3D structure.
ResultEnter values to calculate
The calculation trail will appear here.
Mass, pI & charge details
- Length (residues)
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- Average mass (Da)
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- Monoisotopic mass (Da)
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- Theoretical pI (estimated)
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- Net charge (estimated)
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- GRAVY
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Molecular formula
A280 extinction estimate
Residue counts
Terminal modifications affect calculated properties.
从计算到目录
探索相关产品系列
目录导航，不是生物用途的推荐。这些选择不取决于您的输入或结果。分别确认分子形式和批次文件。
计算依据
方法和源记录
这些链接记录了计算约定或实验室背景。他们不会验证目录批次或取代受控实验室方法。
- 01技术来源
ProtParam 文档
SIB ExPASy。分子量、理论 pI、原子组成、GRAVY 和基于序列的 A280 消光系数的计算说明。
- 02技术来源
Pep-Calc.com：肽和类肽特性以及质谱峰分配
Lear S, Cobb SL. Journal of Computer-Aided Molecular Design. 2016;30:271–277。已发表的肽性质计算器及方法参考文献。