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Peptide Purity Guidelines

Peptide Purity Selection Guide by Application

Purity	Application
Crude or higher by HPLC	Non-sensitive screening Sequence optimization Protein-protein interactions studies Receptor-ligand interactions studies
75% to 85% by HPLC	Peptide arrays ELISA testing
85% to 90% by HPLC	Epitope mapping Phosphorylation assays Coating tissue culture plates for cell attachment Protein electrophoresis applications Non-quantitative or semi-quantitative enzyme-substrate studies Peptide antigens for affinity purification Peptide antigens for antibody production Non-quantitative peptide blocking studies for Western Blot Coupling to chromatography resins for affinity purifications
>95% by HPLC	In-vitro bioassays & studies NMR studies Enzymology Quantitative receptor-ligand interactions studies Quantitative blocking and competitive inhibition studies Quantitative phosphorylation studies Quantitative proteolysis studies
>98% by HPLC	Sensitive Bioassay Cosmetic peptides Active pharmaceutical ingredients Clinical trials Crystallography SAR studies

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