PNC-27 50mg — Vial Spec, Reconstitution Math & COA

PNC-27 50mg Format Overview & Procurement Guidance

A 50mg vial of PNC-27 contains a high-purity, lyophilized cake designed for laboratories conducting extensive benchtop investigations. This specific high-mass presentation is primarily ordered by academic institutions, biotechnology research teams, and automated screening facilities that require substantial peptide volume from a single manufacturing lot. Utilizing a single 50mg lot minimizes batch-to-batch variance across multi-plate cytotoxicity screens, surface plasmon resonance (SPR) binding assays, and confocal microscopy studies.

To maintain rigorous quality control, PX1 Research offers standard analytical sizes of PNC-27 (such as 5mg or 10mg vials) directly through our standard product catalog. The 50mg bulk specification is supplied primarily for institutional custom orders, high-density screening workflows, or institutional accounts managed through our wholesale portal. Researchers seeking alternative quantities or complementary research compounds can inspect our full catalog of all peptides for immediate dispatch.

Biochemical Mechanism: Selective HDM-2 Binding & Transmembrane Pore Formation

PNC-27 is a synthetic 32-amino-acid chimeric peptide consisting of an HDM-2-binding domain (residues 12–26 of the p53 tumor suppressor protein) attached to a cell-penetrating transmembrane domain derived from penetratin (Antennapedia homeodomain). Preclinical studies suggest that PNC-27 targets transformed cells by binding selectively to HDM-2 protein complexes localized in the cancer cell membrane, a target largely absent on non-transformed somatic cell membranes.

In vitro data indicate that upon binding membrane-bound HDM-2, PNC-27 undergoes a conformational transition, inserting its transmembrane domain directly into the lipid bilayer. This interaction induces rapid transmembrane pore formation, disrupting membrane integrity and causing cell lysis via necrosis within minutes. Importantly, this necrogenic mechanism operates independently of intracellular p53 status, allowing researchers to evaluate its efficacy across p53-mutated, p53-null, and p53-wild-type cell lines.

Reconstitution Mathematics for a 50mg PNC-27 Vial

Reconstituting a 50mg vial of PNC-27 requires accurate volumetric calculations to establish controlled stock solutions for microplate assays. Because 50mg represents a substantial mass, selecting the appropriate volume of sterile diluent determines whether the stock solution is suitable for direct micro-pipetting or requires secondary serial dilution.

When calculating concentration, the mass (50 mg) is divided by the added liquid volume (V). Applying common lab diluents yields the following baseline stock concentrations:

• 1.0 mL Diluent: Yields a concentration of 50.0 mg/mL (50.0 µg/µL or 50,000 ppm). • 2.0 mL Diluent: Yields a concentration of 25.0 mg/mL (25.0 µg/µL or 25,000 ppm). • 3.0 mL Diluent: Yields a concentration of approximately 16.67 mg/mL (16.67 µg/µL). • 5.0 mL Diluent: Yields a concentration of 10.0 mg/mL (10.0 µg/µL or 10,000 ppm).

For precise molarity determinations based on the exact molecular weight of the lot, researchers can utilize our interactive reconstitution calculator to determine micro-molar (µM) concentrations for cell culture media additions.

Aliquot Planning and Long-Term Storage Stability Protocols

Lyophilized PNC-27 should be stored upon arrival at -20°C or -80°C in a desiccated environment. Under these conditions, the un-reconstituted peptide cake maintains structural integrity and activity for up to 24 months. Exposure to ambient temperatures and moisture must be minimized to prevent premature hydrolysis or aggregation.

Once reconstituted, peptide solutions are prone to physical degradation if subjected to repeated freeze-thaw cycles. Laboratories processing a 50mg vial should immediately aliquot the stock solution into single-use, low-protein-binding polypropylene microcentrifuge tubes. Aliquots should be frozen rapidly at -80°C. Working aliquots thawed for immediate assay use should be held at 4°C and consumed within 24 to 48 hours to ensure reproducible experimental results.

Analytical Verification: HPLC, MS, and Endotoxin Control

Every production lot of PNC-27 manufactured for PX1 Research undergoes strict analytical evaluation in an independent, ISO 17025 accredited laboratory facility. Quality assurance parameters are verified prior to final packaging and lot assignment.

• High-Performance Liquid Chromatography (HPLC): Confirms chromatographic purity equal to or exceeding 98.0%, ensuring the absence of truncated sequences or chemical impurities. • Mass Spectrometry (MS): Verifies exact monoisotopic molecular weight matching the theoretical sequence of PNC-27. • Endotoxin Testing: Measured via chromogenic Limulus Amebocyte Lysate (LAL) testing to ensure endotoxin levels remain strictly below <0.05 EU/mg, preventing confounding inflammatory responses in cell culture models.

Researchers can review or download lot-specific documentation directly from our central COA database.

Sizing Strategy: 50mg Bulk vs. Standard Analytical Micro-Vials

Selecting the correct vial size depends entirely on the design, scale, and duration of the planned research project. Using an oversized or undersized format can lead to unnecessary peptide waste or increased experimental variation.

Standard 5mg and 10mg vials are ideal for exploratory concentration-response experiments, single-plate viability assays, or brief assay runs where stock solutions are consumed rapidly. Conversely, a 50mg vial is optimal for automated high-throughput screening (HTS) robotics, structural NMR/CD spectroscopy, or extensive preclinical comparative panels running across multiple cell lines simultaneously over several weeks. Utilizing a single 50mg vial ensures consistent peptide performance across all experimental plates.

Comparative Analysis: PNC-27 vs. Related Pore-Forming & HDM-2 Peptides

When evaluating membrane-active or p53-pathway research compounds, researchers frequently compare PNC-27 against other targeted peptides. In comparative oncology cell line models, scientists often evaluate the cytotoxic kinetics of PNC-27 alongside PNC-28 (a p53-derived peptide featuring an alternative structural conformation), p28 (an azurin-derived cell-penetrating peptide that stabilizes intracellular p53), and broad-spectrum pore-forming peptides such as LL-37. While LL-37 demonstrates non-selective lipid membrane disruption across both mammalian and bacterial membranes, PNC-27 exhibits target-dependent specificity directed by cell-surface HDM-2 expression. Additional technical papers on these mechanisms can be found in our research library.

Experimental Assay Considerations for In Vitro Handling

In vitro assays evaluating PNC-27 require careful control of culture conditions to prevent non-specific binding or serum interference. Because cell-penetrating and amphipathic peptides can bind serum proteins such as bovine serum albumin (BSA), initial exposure protocols often utilize serum-free or low-serum media during the first 1 to 2 hours of incubation.

Assay readouts typically measure membrane permeabilization using lactate dehydrogenase (LDH) leakage assays, propidium iodide (PI) uptake via flow cytometry, or real-time impedance monitoring. Control wells containing non-transformed cells (which lack surface HDM-2 expression) should be run in parallel to confirm selective target engagement.

PX1 Research Quality Assurance & US Supply Logistics

PX1 Research is dedicated to supplying the scientific community with fully characterized, highly stable research compounds. All peptides are manufactured in state-of-the-art facilities located within the United States, operating in compliance with strict cGMP standards.

Orders placed before daily cutoff thresholds are dispatched same-day from our primary distribution facilities in California and Arizona. Lyophilized peptides are packaged in temperature-controlled, light-shielded containers to maintain molecular stability during transport, ensuring that laboratories receive compounds meeting exact analytical specifications.