CJC-1295 Without DAC: Complete Research Protocol and Quality Verification

CJC-1295 Without DAC: Complete Research Protocol and Quality Verification

CJC-1295 Without DAC: Why the Distinction Matters for Research

CJC-1295 without DAC (also known as Mod GRF 1-29) has a significantly shorter half-life than the DAC-conjugated version — this fundamentally changes how it should be used in research protocols. Labs that confuse the two variants risk invalidating their experimental data.

The DAC Difference

DAC (Drug Affinity Complex) conjugation extends CJC-1295’s half-life from approximately 30 minutes to 8 days by binding to serum albumin — but the DAC version has a different pharmacological profile that is not interchangeable with Mod GRF 1-29. When ordering research material, confirm explicitly which variant you are receiving.

Purity Requirements

Research-grade CJC-1295 without DAC should test at ≥98% purity by HPLC with molecular weight confirmation via mass spectrometry. Common synthesis impurities include deletion sequences and oxidation products — both of which appear as secondary peaks on HPLC and can skew experimental results.

FAQ

Q: What’s the correct storage for CJC-1295 without DAC?

A: Lyophilized powder at -20°C, protected from light and moisture. Reconstituted peptide at 4°C, used within 7 days. Avoid repeated freeze-thaw cycles — aliquot upon reconstitution.

Q: How do I confirm I received the right variant (no DAC vs with DAC)?

A: Mass spectrometry is the definitive test — CJC-1295 without DAC has a molecular weight of 3367.2 Da, while DAC-conjugated CJC-1295 is approximately 6556 Da. Request MS data specific to your batch.