Source comparison
TB-4 vs TB-500: Research Application Comparison
Understanding when to use TB-4 versus TB-500 depends on the research question, model system, and whether immune modulation is a desired variable or a confounding factor. Amino Acid Length 43 residues, ~4,963 Da 17 residues, ~1,806 Da TB-500's shorter chain sim
This comparison does not assign a generated winner or score.
- Understanding when to use TB-4 versus TB-500 depends on the research question, model system, and whether immune modulation is a desired variable or a confounding factor.
- Amino Acid Length
- 43 residues, ~4,963 Da
- 17 residues, ~1,806 Da
- TB-500's shorter chain simplifies synthesis and improves batch consistency
- Mechanism Scope
- Actin-binding + immune modulation + VEGF upregulation + NF-κB pathway engagement
- Actin-binding + cell migration + localized angiogenesis (no immune signaling)
- TB-4 offers systemic effects; TB-500 isolates regenerative pathways
- Synthesis Cost
- Higher (longer chain, more complex coupling)
- Lower (shorter sequence, fewer synthesis steps)
- TB-500 is 30–40% less expensive per milligram in small-batch production
- Stability Post-Reconstitution
- Prone to aggregation; requires pH 6.5–7.5; stable 14–21 days at 2–8°C
- Stable across broader pH range; remains active 28 days at 2–8°C
- TB-500's stability reduces protocol failure from degradation
- Immune System Effects
- Modulates T-cell differentiation, dendritic cell maturation, cytokine profiles
- Minimal to no immune modulation
- TB-4 appropriate for autoimmune or inflammation models; TB-500 avoids immune confounds
- Research Applications
- Cardiac repair post-MI, chronic inflammation, immune response studies, systemic injury
- Localized wound healing, tendon/ligament repair, corneal injury, dermal regeneration
- Choose based on whether immune variables are signal or noise
- The bottom line: if your protocol measures immune markers, systemic inflammation, or involves chronic disease models where immune dysfunction is part of the pathology. TB-4 is the correct choice. If you're isolating tissue repair capacity, studying localized injury without systemic effects, or need cleaner data without immune confounds. TB-500 delivers targeted results at lower cost.