Bronchogen is a synthetic bioregulator tetrapeptide evaluated in biophysical assays to examine peptide-nucleic acid interactions, chromatin accessibility, and double-stranded DNA melting dynamics. PX1 Research supplies laboratory-grade Bronchogen manufactured in the USA with lot-specific COAs for precise in vitro and spectroscopic research.
Bronchogen is a synthetic bioregulator tetrapeptide evaluated in biophysical assays to examine peptide-nucleic acid interactions, chromatin accessibility, and double-stranded DNA melting dynamics. PX1 Research supplies laboratory-grade Bronchogen manufactured in the USA with lot-specific COAs for precise in vitro and spectroscopic research.
Investigators seeking to buy Bronchogen for DNA thermostability research require analytical-grade peptide formulations characterized by documented sequence fidelity and low endotoxin levels. Bronchogen (Ala-Asp-Glu-Leu) is a synthetic short bioregulator peptide investigated in biophysical chemistry for its capacity to interact with specific nucleotide sequences, alter DNA thermal denaturation profiles (melting temperature, $T_m$), and influence chromatin decondensation in preclinical models.
When purchasing compounds for nucleic acid binding or spectroscopic assays, analytical rigor is critical. Minute impurities or counter-ion variations can distort thermal denaturation curves, circular dichroism (CD) spectra, and fluorescence quenching assays. PX1 Research provides high-purity research peptides manufactured under strict quality standards to ensure reproducible experimental results across cell culture and biophysical paradigms.
Bronchogen is a synthetic tetrapeptide consisting of L-amino acid residues: L-alanyl-L-alpha-aspartyl-L-alpha-glutamyl-L-leucine (Ala-Asp-Glu-Leu). With a molecular weight of approximately 460.44 g/mol, its structure features acidic side chains provided by aspartic acid and glutamic acid, balanced by a hydrophobic leucine terminus and a neutral alanine N-terminus.
In biophysical experiments, this chemical structure allows Bronchogen to engage in targeted electrostatic, hydrogen-bonding, and hydrophobic interactions with nucleic acids and histone proteins. Researchers examine how these specific side-chain topologies allow short peptide bioregulators to fit into the major or minor grooves of double-stranded DNA, influencing the physical stability of the double helix under thermal stress.
DNA thermostability assays measure the thermodynamic resistance of double-stranded DNA (dsDNA) to thermal dissociation into single strands. The temperature at which 50% of the helical structure denatures is defined as the melting temperature ($T_m$). In vitro spectroscopic studies indicate that small bioregulatory peptides can bind to dsDNA and shift this thermal transition point.
When Bronchogen complexes with dsDNA, hydrogen bonding between carboxyl groups and nucleotide base pairs—alongside backbone electrostatic interactions—stabilizes the double helix. Biophysical research utilizes UV spectrophotometry (monitoring hyperchromic shifts at 260 nm), differential scanning calorimetry (DSC), and fluorescence intercalation assays to quantify these changes. Comparative studies in our research library document how short peptides alter structural rigidity and entropy during thermal denaturation.
Beyond isolated DNA melting assays, preclinical literature explores Bronchogen's role in higher-order chromatin organization. In cellular senescence models and primary bronchial tissue cultures, researchers evaluate how peptide binding to heterochromatin promotes local decondensation, rendering specific promoter regions accessible to RNA polymerase II and transcription factors.
In vitro models demonstrate that Bronchogen modulates the expression of genes involved in cellular homeostasis, antioxidant defense, and mucin production within respiratory epithelial cells. By altering local histone-DNA electrostatic screening, the tetrapeptide influences epigenetic markers without modifying the primary nucleotide sequence, serving as a model compound for non-coding peptide regulation.
To understand peptide-nucleic acid interactions, researchers frequently compare Bronchogen against related short bioregulator peptides. While Bronchogen targets respiratory models and specific DNA sequences, compounds like Epitalon (Ala-Glu-Asp-Gly) are studied for telomerase activity and heterochromatin decondensation in aging assays. Similarly, Vilon (Lys-Glu) focuses on immune cell chromatin activation, and Livagen modulates chromatin structure in hepatic models.
Comparative thermal melting experiments show that variations in amino acid charge distribution significantly alter binding affinity ($K_d$) and $T_m$ elevation. Bronchogen’s dual acidic residues (Asp-Glu) impart distinct binding kinetics compared to basic or neutral bioregulators, providing a targeted tool for sequence-specific DNA stability research.
In respiratory cell models—such as human bronchial epithelial cell lines (BEAS-2B, A549) and primary tracheal fibroblast cultures—Bronchogen is investigated for its protective effects against oxidative stress and inflammatory stimuli. Researchers introduce the peptide to cultured cells exposed to hydrogen peroxide, lipopolysaccharide (LPS), or environmental particulates.
These in vitro studies measure marker expression including interleukin-6 (IL-6), tumor necrosis factor-alpha (TNF-alpha), and surfactant proteins. By maintaining genomic stability and regulating transcript levels under cell stress, Bronchogen provides valuable insight into peptide-mediated cellular repair pathways in preclinical lung models.
Achieving consistent results in biophysical and DNA melting assays requires strict reconstitution protocols. Lyophilized Bronchogen should be dissolved in sterile, deionized water or low-ionic-strength buffer (such as 10 mM Tris-HCl, pH 7.4, with 1 mM EDTA) depending on the requirements of the downstream spectroscopic assay. High salt concentrations can screen electrostatic interactions, potentially masking peptide-DNA binding effects.
For cell culture assays, reconstitution in sterile phosphate-buffered saline (PBS) or culture media is standard. Aliquots should be prepared immediately following solubilization and stored at -20°C or -80°C to prevent freeze-thaw degradation. Stock solutions must be kept sterile to avoid enzymatic cleavage by microbial peptidases.
Biophysical studies measuring subtle thermodynamic shifts ($T_m$ variations of 0.5°C to 3.0°C) demand high purity. Impurities like truncated peptide sequences, residual trifluoroacetic acid (TFA), or synthesis side-products interfere with absorbance measurements and disrupt nucleic acid complexation.
PX1 Research subjects every lot of Bronchogen to rigorous quality testing: reverse-phase high-performance liquid chromatography (RP-HPLC) to confirm purity exceeding 98%, electrospray ionization mass spectrometry (ESI-MS) to confirm exact molecular weight, and chromogenic LAL assays to ensure minimal endotoxin content (<0.005 EU/mg). This ensures that experimental outcomes reflect true peptide activity rather than endotoxin-induced cellular stress.
PX1 Research is a trusted US supplier of research-grade peptides, dedicated exclusively to supporting academic, biotechnology, and institutional laboratories. Every product is synthesized in domestic, GMP-compliant facilities and subjected to independent verification by ISO 17025 accredited laboratories.
We provide transparent documentation with lot-specific Certificates of Analysis (COAs) available for every order. Orders are shipped directly from our California and Arizona logistics hubs with same-day dispatch (Monday–Friday). Principal investigators and laboratory managers can also explore wholesale laboratory accounts for high-volume biophysical screening projects.
What is Bronchogen used for in laboratory research?
Bronchogen (Ala-Asp-Glu-Leu) is a synthetic research peptide studied in vitro and in biophysical assays to examine peptide-DNA interactions, DNA thermostability ($T_m$ shifts), chromatin decondensation, and epigenetic regulation in respiratory cell models.
How does Bronchogen alter DNA thermostability?
Biophysical research suggests Bronchogen binds to the major or minor grooves of double-stranded DNA via electrostatic and hydrogen bonds, altering double helix rigidity and shifting the thermal melting temperature ($T_m$) during spectroscopic denaturation assays.
What purity level is required for DNA thermal melting assays?
Thermodynamic and spectroscopic assays require peptide purity >98% as determined by RP-HPLC. Lower purity levels or residual TFA counter-ions can cause baseline drift and false $T_m$ shifts.
How should lyophilized Bronchogen be stored upon arrival?
Desiccated lyophilized peptide should be stored at -20°C or -80°C away from light and moisture. Upon reconstitution, aliquot the solution and keep frozen to avoid degradation from repeated freeze-thaw cycles.
What buffers are recommended for reconstituting Bronchogen for DNA binding assays?
Low-ionic-strength buffers such as 10 mM Tris-HCl (pH 7.4) or 10 mM sodium phosphate buffer are ideal for biophysical assays, as excess salt ions can screen electrostatic binding between the peptide and DNA.
Does PX1 Research provide endotoxin testing for Bronchogen?
Yes. Every batch of Bronchogen undergoes LAL assay testing to verify low endotoxin levels (<0.005 EU/mg), ensuring compatibility with sensitive cell culture models and biophysical assays.
Are PX1 Research products intended for human therapeutic use?
No. All products supplied by PX1 Research are strictly for laboratory research, in vitro experimentation, and preclinical biophysical investigation. They are not for human or veterinary use.
All products are sold strictly for laboratory and research use only. Not for human or veterinary use, diagnosis, treatment or consumption. Statements have not been evaluated by the FDA.