4A/4B, 5A/5B Peptide

4A/4B, 5A/5B Peptide is a 10-residue synthetic peptide with the sequence Asp-Glu-Met-Glu-Glu-Cys-Ser-Met-Ser-Tyr. C-terminal amidation removes the terminal carboxylate charge. The sequence contains 1 cysteine residue, providing potential thiol/disulfide chemistry when the thiol is available; contains 1 Asp and 3 Glu residues, contributing anionic character near neutral pH. These sequence-derived properties describe the reagent chemically; no specific receptor, enzyme, pathway, disease association, or biological activity is assigned without product-specific experimental evidence.

• thiol-selective conjugation or immobilization studies
• LC-MS/HPLC analytical method development
• sequence-specific assay controls

Sequence-derived chemical properties support reagent selection and experimental planning but do not establish biological function. Solubility, aggregation, adsorption, conjugation efficiency, and assay performance should be validated under the intended experimental conditions.