How to Reconstitute MOTS-c?
Reconstitute 10mg MOTS-c by injecting 2.0 mL bacteriostatic water slowly down the vial wall to achieve 5.0 mg/mL. Swirl gently until clear (never shake), and store refrigerated at 2°C–8°C.
Reconstitution is the aseptic dissolution of freeze-dried (lyophilized) peptide powder using a sterile diluent. For MOTS-c (a 16-amino-acid mitochondrial-derived peptide), bacteriostatic water for injection containing 0.9% benzyl alcohol is standard for multi-dose laboratory storage. The volume of diluent introduced dictates the final concentration in milligrams per milliliter (mg/mL) and calibrates syringe graduation markings on a U-100 insulin syringe (100 units = 1.0 mL).
MOTS-c Dilution Reference for 5 mg and 10 mg Vials
| Vial Size | BAC Water Added | Solution Concentration | Amount per U-100 Unit | Example 2.0 mg Draw |
|---|---|---|---|---|
| 5 mg | 1.0 mL | 5.0 mg/mL (5,000 mcg/mL) | 0.05 mg (50 mcg) | 40 units (0.40 mL) |
| 5 mg | 2.0 mL | 2.5 mg/mL (2,500 mcg/mL) | 0.025 mg (25 mcg) | 80 units (0.80 mL) |
| 5 mg | 3.0 mL | 1.67 mg/mL (1,667 mcg/mL) | 0.017 mg (16.7 mcg) | 120 units (Exceeds 1.0 mL) |
| 10 mg | 1.0 mL | 10.0 mg/mL (10,000 mcg/mL) | 0.10 mg (100 mcg) | 20 units (0.20 mL) |
| 10 mg | 2.0 mL | 5.0 mg/mL (5,000 mcg/mL) | 0.05 mg (50 mcg) | 40 units (0.40 mL) |
| 10 mg | 3.0 mL | 3.33 mg/mL (3,333 mcg/mL) | 0.033 mg (33.3 mcg) | 60 units (0.60 mL) |
Worked Calculation: 10 mg MOTS-c Vial with 2.0 mL Diluent
- Vial content: 10 mg of lyophilized MOTS-c powder
- Diluent added: 2.0 mL of bacteriostatic water
- Illustrative research quantity: 2.0 mg (2,000 mcg)
- Syringe type: Standard U-100 insulin syringe (100 units = 1.0 mL)
- Calculate concentration: 10 mg ÷ 2.0 mL = 5.0 mg/mL (5,000 mcg/mL).
- Determine graduation unit resolution: 5.0 mg/mL ÷ 100 units/mL = 0.05 mg (50 mcg) per U-100 unit mark.
- Calculate liquid draw volume: 2.0 mg ÷ 5.0 mg/mL = 0.40 mL.
- Convert volume to syringe markings: 0.40 mL × 100 units/mL = 40 units on a U-100 syringe barrel.
- Deterministic back-check: 40 units × 0.05 mg/unit = 2.0 mg (0.40 mL × 5.0 mg/mL = 2.0 mg), confirming mathematical consistency.
Draw exactly 40 units (0.40 mL) on a U-100 insulin syringe. A 40-unit volume fits with high visual resolution on a 0.5 mL (50-unit) syringe barrel.
Note: Deterministic arithmetic verification: 40 units × 0.05 mg/unit = 2.0 mg. The 2.0 mg figure is an illustrative laboratory calculation example only, not clinical advice.
Step-by-Step Instructions
- Gather Sterile Supplies
Prepare supplies on a sanitized surface: MOTS-c lyophilized vial, bacteriostatic water vial, a 2.0 mL mixing syringe, a U-100 insulin syringe, 70% isopropyl alcohol prep pads, and a sharps disposal container.
- Disinfect Vial Septums
Remove flip-off caps from both vials. Wipe the exposed rubber stoppers with fresh alcohol prep pads and allow them to air-dry completely.
- Introduce Diluent Slowly
Draw 2.0 mL of bacteriostatic water. Puncturing at a slight angle, rest the needle against the inner glass wall of the MOTS-c vial. Depress the plunger slowly so diluent streams down the glass without foaming the powder.
- Dissolve with Gentle Swirling
Withdraw the needle. Swirl or roll the vial gently between palms until all solids dissolve into a crystal-clear solution. Never shake the vial.
- Label and Refrigerate
Label the vial with reconstitution date and concentration (5.0 mg/mL). Store upright under refrigeration at 2°C–8°C (36°F–46°F), protected from intense light.
Common Mistakes to Avoid
- ⚠️Vigorous Shaking Creating Shearing Forces
Aggressive shaking creates cavitation and foaming that can shear delicate peptide chains. Always swirl or roll gently.
- ⚠️Spraying Liquid Directly Against Lyophilized Cake
Rapid jetting of water directly onto the dry cake causes splattering and incomplete dissolution. Always direct the needle tip to run liquid down the inner glass wall.
- ⚠️Syringe Graduation Discrepancy (U-100 vs U-40)
All calibrations assume U-100 insulin syringes (100 units = 1.0 mL). Using a U-40 veterinary syringe creates a 2.5-fold volume discrepancy (40 units on U-40 equals 1.0 mL).
Why It Matters
Adding 2.0 mL of bacteriostatic water to a 10 mg MOTS-c vial yields 5.0 mg/mL, making each U-100 graduation unit equal to 0.05 mg (50 mcg). This allows clean whole-unit syringe readings across typical milligram research increments, avoiding unreadable fractions.
Meticulous aseptic technique preserves synthetic peptide integrity. To calculate draws across custom vial masses or target research amounts, use the MOTS-c dosage calculator. You can also explore our core protocol on how to reconstitute peptides or review our diluent volume guide on how much bacteriostatic water for peptides.
Calculate Your Exact Dosage
Use our interactive calculator to get instant reconstitution and draw units.
- A clinical protocol, human metabolic dosing schedule, or medical guidance.
- The cellular mitochondrial response or AMPK phosphorylation level in any biological subject.
- Long-term solution stability beyond standard 2°C–8°C sterile compounding parameters.
This tool converts volumetric liquid measurements and syringe tick marks only. It does not provide medical guidance, dosing schedules, or clinical administration protocols. Review our Medical & Research Disclaimer.
Related Questions
Scientific & Regulatory References
View Full Sources Registry→The mathematical formulas on this page are deterministic volumetric conversions. Non-mathematical parameters, regulatory status notes, and chemical safety guidelines are referenced directly to the primary sources cataloged below:
- [1]The Mitochondrial-Derived Peptide MOTS-c Promotes Metabolic HomeostasisCell Metabolism (PubMed PMID: 25738459)•Type: peer reviewed•Verified: 2026-10-20
Primary publication characterizing the 16-amino acid mitochondrial peptide and AMPK activation.
- [2]World Anti-Doping Code International Standard: Prohibited List (S2: Peptide Hormones)World Anti-Doping Agency (WADA)•Type: regulatory list•Verified: 2026-10-20
Prohibits growth hormone secretagogues (GHS), GH fragments, BPC-157, TB-500, and metabolic modulators.
- [3]Bacteriostatic Water for Injection, USP Multi-Dose Prescribing DetailsU.S. National Library of Medicine (DailyMed / Hospira / Pfizer)•Type: fda label•Verified: 2026-10-20
Sterile multi-dose diluent specification containing 0.9% (9 mg/mL) benzyl alcohol preservative.
- [4]Embecta Ultra-Fine™ U-100 Insulin Syringe Product Specificationsembecta (formerly BD Diabetes Care)•Type: manufacturer spec•Verified: 2026-11-08
Manufacturer specifications for sterile single-use U-100 insulin syringes (0.3 mL, 0.5 mL, and 1.0 mL capacities with 1-unit and 1/2-unit scales).