PNC-27 10mg — Vial Spec, Reconstitution Math & COA

PNC-27 10mg Vial Specifications & Laboratory Applications

A 10mg mass configuration of PNC-27 is engineered primarily for research laboratories conducting high-concentration cell culture experiments, repeated dosage-range assays, or parallel structural evaluations. PNC-27 is a synthetic 32-amino-acid peptide derived from the p53 sequence (residues 12–26) linked to a transmembrane-penetrating domain (penetratin). Containing 10 milligrams of lyophilized peptide mass, this vial sizing enables investigators to prepare concentrated stock solutions without requiring frequent reconstitution of smaller, single-use units.

In experimental workflows, a single 10mg vial provides sufficient material to prepare multiple microplate replicates across varying micromolar (µM) concentrations. Principal investigators and laboratory technicians typically select the 10mg format when running comparative cytotoxicity screens against transformed cell lines or performing membrane binding kinetics. To evaluate current stock availability or alternative mass options, researchers can reference the main PNC-27 product page or browse our complete index of all research peptides.

It is critical to note that PNC-27 supplied by PX1 Research is strictly designated for in vitro and preclinical research applications. It is not intended, formulated, or authorized for human or veterinary administration, clinical diagnostics, or therapeutic applications.

Molecular Mechanism & HDM-2 Membrane Interaction

PNC-27 functions as a membrane-active research peptide investigated primarily for its affinity toward cell-surface-expressed HDM-2 (human double minute 2) proteins. In non-transformed somatic cells, HDM-2 acts primarily as an intracellular E3 ubiquitin ligase regulating p53 degradation. However, preclinical evidence indicates that many transformed cancer cell lines express HDM-2 directly within their plasma membranes.

In vitro models suggest that PNC-27 binds selectively to membrane-bound HDM-2 via its p53-derived helical domain. Upon binding, the attached transmembrane penetratin domain facilitates insertion into the lipid bilayer. This interaction induces transmembrane pore formation, leading to rapid loss of membrane integrity and subsequent cell lysis (necrosis). Crucially, this lytic mechanism operates independently of the canonical intracellular p53 signaling pathway, allowing researchers to study membrane disruption in both p53-wildtype and p53-mutated or p53-null cancer models.

Researchers exploring structural biology and peptide-membrane dynamics can review published data within our broader research library hub to examine how amphipathic alpha-helical peptides disrupt bilayer stability under physiological ionic conditions.

Reconstitution Mathematics for 10mg Mass Formulations

Accurate dilution calculations are vital when preparing stock solutions from a 10mg lyophilized cake. Because liquid handling precision directly influences molar concentrations in cell culture media, researchers must calculate final milligram-per-milliliter (mg/mL) and micromolar (µM) values based on total diluent volume added to the vial.

Standard reconstitution volumes for a 10mg PNC-27 vial yield the following nominal concentrations:

• 1.0 mL Diluent Addition: 10.0 mg/mL stock concentration. (Adding 1.0 mL of bacteriostatic water or sterile phosphate-buffered saline results in a 10 µg/µL working stock, ideal for low-volume, high-concentration assays). • 2.0 mL Diluent Addition: 5.0 mg/mL stock concentration. (Adding 2.0 mL yields 5 µg/µL, balancing volumetric accuracy during micro-pipetting with stock longevity). • 3.0 mL Diluent Addition: 3.33 mg/mL stock concentration. (Adding 3.0 mL yields approximately 3.33 µg/µL, suitable for broad volume dispensing across larger cell culture plates).

To rapidly model custom molarities based on the specific molecular weight of PNC-27 (approximately 4,031.7 g/mol), laboratory personnel are encouraged to utilize our automated reconstitution calculator to eliminate manual conversion errors prior to diluent delivery.

Handling, Solubilization, and Aliquot Protocols

Lyophilized PNC-27 must be handled using standard aseptic techniques within a certified biosafety cabinet. Prior to reconstitution, vials should be allowed to equilibrate to room temperature to prevent condensation within the glass container. When introducing diluent, direct the stream along the inner glass wall rather than directly onto the lyophilized mass to minimize shearing forces.

Swirl the vial gently with a smooth circular motion until the peptide cake fully dissolves. Avoid vigorous vortexing or rapid agitation, as mechanical stress can induce aggregation or foaming in amphipathic peptide sequences. For long-term study stability, reconstituted stock solutions should be immediately divided into single-use aliquots using polypropylene microcentrifuge tubes.

Aliquoting prevents repetitive freeze-thaw cycles, which degrade peptide chain stability and alter pore-forming efficiency in downstream assays. Aliquots should be labeled with the batch concentration, date of reconstitution, and lot number before being stored at -20°C or -80°C.

Analytical Quality Assurance: HPLC, MS, and Endotoxin Testing

To ensure experimental reproducibility across cell lines, every batch of PNC-27 manufactured for PX1 Research undergoes rigorous third-party analytical testing. High-Performance Liquid Chromatography (HPLC) is conducted to verify sequence purity, confirming that the target peptide mass meets or exceeds our strict laboratory threshold of 98.0%.

Mass Spectrometry (MS) is simultaneously performed to confirm exact molecular weight and verify the structural identity of the 32-amino-acid chain, ensuring the absence of deletion sequences or incomplete synthesis artifacts. Furthermore, because cell culture models are highly sensitive to bacterial contaminants, lot-specific chromogenic LAL assays are conducted to ensure endotoxin levels remain strictly below threshold limits (<0.01 EU/mg).

Investigators requiring documentation for institutional compliance or laboratory audit trails can retrieve fully batch-matched documents directly through our certificate of analysis portal.

Evaluating Vial Sizing: When is 10mg Recommended?

Selecting the appropriate vial mass depends on the experimental design, sample size, and duration of the research project. While smaller mass units (such as 2mg or 5mg vials) are optimal for single-plate pilot studies or preliminary binding confirmation, a 10mg vial configuration offers operational advantages for larger research efforts.

A 10mg vial is recommended when running multi-dose response curves across extensive cell panels, conducting structural NMR analysis requiring elevated peptide concentrations, or performing continuous multi-week in vitro assays. Ordering 10mg units reduces lot-to-lot handling variation across extended experimental timelines.

Conversely, if an assay requires only isolated, low-volume assays spread over several months, utilizing smaller fill sizes may reduce potential peptide degradation associated with extended liquid storage. Researchers managing large-scale operations or requiring custom batch allocations can discuss specialized packaging through our wholesale lab account portal.

Comparative Analysis: PNC-27 and Related Pore-Forming Peptides

PNC-27 belongs to a specialized class of membrane-active research peptides designed to target cell-surface markers. Understanding how PNC-27 compares to related structural analogues and membrane-disrupting peptides helps investigators select the precise compound for their analytical models.

When evaluating membrane-active mechanisms, researchers frequently compare PNC-27 with PNC-28, a closely related 17-mer peptide derived from the same p53 region attached to a similar penetratin leader sequence. While both target membrane-bound HDM-2, structural variations affect bilayer insertion kinetics. Additionally, investigators studying non-specific lytic peptides often analyze compounds like Melittin alongside HDM-2-specific targeted agents to differentiate receptor-mediated pore formation from generalized phospholipid lysis.

Further detailed evaluations of signal transduction pathways and p53-independent cell death pathways can be explored in our specialized guide on p53 pathway peptide research.

Storage and Stability Specifications

Lyophilized PNC-27 10mg vials should be stored at -20°C upon receipt for short-to-medium term storage, or at -80°C for extended archival storage. Under desiccated, sub-zero conditions, the lyophilized peptide remains stable for up to 24 months without significant degradation of primary structure.

Once reconstituted in sterile aqueous buffers (such as PBS at pH 7.4), stock solutions should be kept refrigerated at 2°C to 8°C if they are to be used within 24 to 48 hours. For extended storage beyond 48 hours, reconstituted stock must be frozen in single-use aliquots at -20°C or colder to prevent peptide cleavage or aggregation.

Exposure to ambient light, elevated temperatures, and atmospheric moisture should be strictly minimized. Always allow frozen aliquots to thaw slowly on ice prior to adding the compound to cell culture media or testing buffers.