Understand the source comparison
Kisspeptin Science Explained: [Comparison Table]
Below is a comparison of kisspeptin isoforms commonly referenced in research, highlighting structural differences, receptor affinity, half-life characteristics, and practical research applications. Kisspeptin-54 (Metastin) 54 aa (full-length) ~1.5 nM (high aff
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- Below is a comparison of kisspeptin isoforms commonly referenced in research, highlighting structural differences, receptor affinity, half-life characteristics, and practical research applications.
- Kisspeptin-54 (Metastin)
- 54 aa (full-length)
- ~1.5 nM (high affinity)
- ~30 minutes in humans
- Ovulation induction, fertility studies, HPG axis restoration
- Full-length isoform; longer half-life than truncated forms; used in clinical trials for ovulation; highest stability in vivo but requires subcutaneous injection due to size
- Kisspeptin-14
- 14 aa (C-terminal fragment)
- ~2.0 nM (high affinity)
- ~15 minutes in humans
- GnRH pulse frequency studies, acute LH surge models
- Retains nearly full receptor activity; shorter half-life limits sustained effects; often used in research requiring rapid, transient signaling without prolonged HPG axis activation
- Kisspeptin-10
- 10 aa (C-terminal fragment)
- ~2.5 nM (high affinity)
- ~10 minutes in humans
- Mechanistic signaling studies, dose-response experiments, in vitro receptor assays
- Smallest biologically active fragment; rapid clearance makes it ideal for controlled experiments; full receptor activation despite minimal structure; most commonly synthesized for laboratory use
- Kisspeptin-13
- 13 aa (C-terminal fragment)
- ~2.2 nM (high affinity)
- ~12 minutes in humans
- Intermediate-duration studies, pulse kinetics research
- Less commonly used than kisspeptin-10 or kisspeptin-14; intermediate properties offer no distinct advantage; research application niche is narrow compared to other isoforms