Short Khavinson-style peptide bioregulators.

Russian bioregulator peptides — also known as Khavinson peptides — are short di-, tri-, and tetra-residue synthetic sequences originally described in Russian peptide bioregulator research. The Nexus catalog includes 15 sequence-defined Khavinson research compounds — examples: Bronchogen, Cardiogen, Cartalax, Chonluten, Cortagen. Supplied for in-vitro research use only. Russian bioregulator research products are short peptide materials often organized by organ-system naming conventions. Nexus keeps this family as its own category because names, buyer intent, and comparison patterns differ from broader peptide classes. The category includes Bronchogen, Cardiogen, Cartalax, Chonluten, Cortagen, Crystagen, Livagen, Ovagen, Pancragen, Prostamax, Testagen, Thymalin, Vesugen, Vilon, and Pinealon. Product pages emphasize identity and catalog structure rather than unsupported mechanism claims.

Bioregulator products are best navigated as a named family because their research context is tied to short peptide identity and historical naming patterns. Nexus avoids forcing these entries into unrelated therapeutic categories, which would create weaker internal linking and less accurate discovery. The category page helps researchers scan the full set quickly, then inspect individual product pages for variant, COA, and chemistry details. Where source records contain warnings or missing values, the product page preserves those gaps rather than fabricating authority.

Nexus uses conservative copy for bioregulators, with batch visibility and lab-testing context prioritized over broad outcome language. Product records should be verified against final supplier and COA documentation before launch.

Compounds in this category are studied in preclinical research models with a tissue-specific research history described primarily in Russian biochemistry literature (V.Kh. Khavinson research group at the St. Petersburg Institute of Bioregulation and Gerontology). Each Khavinson bioregulator has a specific organ/tissue research focus: bronchogen (bronchial / respiratory epithelium), cardiogen (cardiac), cartalax (cartilage), chonluten (respiratory), cortagen (CNS / neuropeptide), crystagen (immune), livagen (hepatic), ovagen (reproductive), pancragen (pancreatic), pinealon (pineal / CNS), prostamax (prostate), testagen (reproductive), thymalin (thymic / immune), vesugen (vascular), and epithalon-adjacent pinealon (pineal axis).

The 15 Khavinson research bioregulators are mostly 4-residue tetrapeptides (a few are di- or tri-peptides). Sequence diversity is intentional — each peptide encodes a specific organ/tissue research focus through its sequence. The category is unique in the catalog because compound identity is anchored by sequence rather than by mechanism: research applications cluster by tissue rather than by receptor.

Common research-stack pairings within the Khavinson family: epithalon + pinealon for pineal-axis research, bronchogen + chonluten for respiratory-axis research, cardiogen + vesugen for cardiovascular-axis research, and thymalin + crystagen for thymic / immune research. Cross-family: thymalin pairs with thymosin alpha-1 (in Healing & Recovery) for immune-research stacks.

Khavinson bioregulators are small (4 amino acids; molecular weights ~400-500 Da) and require specific HPLC methods for short-peptide separation. ESI-MS confirms identity; the small mass simplifies deconvolution. Finalized COA records publish endotoxin context where available, while pending certificates withhold assay values until release.