What the label states, the lot delivers — net peptide mass, not gross powder weight, purity reported as measured rather than rounded up, and a Certificate of Analysis for every lot.
Net peptide mass, not powder weight; purity as measured, not rounded up; a COA per lot.
Net peptide + purity not rounded up. COA per lot.
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FDA PCAC reviews 7 peptides for the 503A bulks list in July. Read →
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Cell-penetrating Wnt/Dvl-modulating peptide · hair-growth research
Overview
PTD-DBM is a fusion peptide developed by Professor Kang-Yell Choi's group at Yonsei University in South Korea, combining a protein transduction domain (PTD, an arginine-rich cell-penetrating sequence) with a Dishevelled-binding motif (DBM). The peptide competitively binds the PDZ domain of Dishevelled (Dvl), blocking the interaction between the negative regulator CXXC5 and Dvl, thereby releasing the brake on Wnt/β-catenin signaling. Vialdyne releases PTD-DBM as a lyophilized peptide against a ≥98% HPLC main-peak specification, supplied with a batch-specific Certificate of Analysis covering RP-HPLC purity, mass-spec identity, appearance, and water content. Lots are released only after the COA is on file.
Applications & buyer fit
Cosmetic-peptide buyers fall into two groups: established beauty / med-aesthetic brands extending an existing line, and OEM clients building a private-label catalog from scratch. The first group usually wants active material plus stability data in their existing carrier matrix; the second usually wants a finished formulation under their label. Both need INCI naming verified, regulator-specific safety files (CPNP for EU, FDA OTC monograph for US where relevant), and packaging-compatibility data.
Sourced for
Buyer fit
Documentation that ships
Procurement note: INCI naming, SDS, and stability data in the chosen carrier ship with the active; finished-product safety remains the brand owner's responsibility.
Primary buyer fit: academic and contract research laboratories.
Specifications
Certificate of Analysis
Published released-batch COAs for PTD-DBM, every lot HPLC-verified. These are previews — request the full high-resolution certificate for any lot.
Browse all published COAsRegulatory note
Research-use-only reference material; not for human or veterinary use.
Selected literature
Frequently asked questions
PTD-DBM ships as white to off-white lyophilized powder with a batch-specific Certificate of Analysis reporting RP-HPLC purity (≥98%), mass-spec identity and sequence H-RRRRRRRR-GGGG-RKTGHQICKFRKC-OH, and appearance. Recommended storage: -20°C, desiccated. Supplied strictly as a research reference material — not for human or veterinary use.
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