Source comparison
Semax Same as Semax Amidate: Side-by-Side Comparison
C-Terminal Structure Free carboxyl (–COOH) Amide (–CONH₂) Amidation blocks carboxypeptidase cleavage Amidate is chemically superior for extended exposure models Plasma Half-Life 20–30 minutes 4–6 hours Determines dosing frequency and experimental timing Semax
This comparison does not assign a generated winner or score.
- C-Terminal Structure
- Free carboxyl (–COOH)
- Amide (–CONH₂)
- Amidation blocks carboxypeptidase cleavage
- Amidate is chemically superior for extended exposure models
- Plasma Half-Life
- 20–30 minutes
- 4–6 hours
- Determines dosing frequency and experimental timing
- Semax requires multiple doses or infusion; Amidate allows single-dose protocols
- Reconstituted Stability (4°C)
- 14–21 days
- 28–35 days
- Affects batch consistency across multi-week studies
- Amidate reduces inter-batch variability in chronic protocols
- Primary Degradation Pathway
- Carboxypeptidase cleavage
- Methionine oxidation
- Dictates storage and handling requirements
- Both require refrigeration; Amidate tolerates minor handling errors better
- Optimal Research Application
- Acute neuroprotection, immediate-early gene studies, time-course assays
- Sustained cognitive protocols, chronic neuroprotection, behavioural assays
- Match peptide form to experimental timeline
- Use Semax for <90 min endpoints; Amidate for >2 hr endpoints
- Cost Differential
- Baseline
- 15–25% higher synthesis cost
- Reflects additional synthetic step and purification
- The stability gain justifies cost in protocols requiring consistent dosing