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Peptide Stability & pH Calculator
Estimate Peptide Stability Across Different pH Conditions
Estimate how pH, temperature and solution type may affect relative peptide stability in research settings.
Stability Score
85
Degradation Risk
Low
Recommended pH Range
6.0 - 8.0
Temperature Impact
Optimal
Your peptide shows good stability under current conditions. The neutral pH and refrigerated storage provide optimal preservation.
Results are provided for educational and research purposes only and should not be relied upon as definitive stability data. Actual stability may vary depending on peptide sequence, formulation, handling procedures and storage conditions.
pH is a measure of acidity or alkalinity on a scale from 1 to 14. A pH of 7 is neutral, below 7 is acidic, and above 7 is basic (alkaline). pH significantly affects peptide stability and biological activity.
Peptides are sensitive to pH changes. Extreme pH values can cause deamidation, oxidation, or hydrolysis of peptide bonds, leading to degradation. Most peptides are most stable at neutral to slightly acidic pH (5.0-7.5).
Lower temperatures significantly slow degradation reactions. Frozen storage (-20°C or below) provides maximum stability. Refrigeration (2-8°C) is suitable for short-term storage. Room temperature storage dramatically increases degradation rates.
Store lyophilized peptides at -20°C in a desiccator. Once reconstituted, use immediately or store at 2-8°C for short-term use. For long-term storage, aliquot and freeze at -20°C or -80°C. Avoid repeated freeze-thaw cycles.
Main degradation pathways include oxidation (especially methionine and cysteine residues), deamidation (asparagine and glutamine), hydrolysis of peptide bonds, aggregation, and microbial contamination. Proper pH, temperature control, and use of appropriate buffers minimize these risks.