Peptide Terminology

A Detailed Glossary for UK Research

At Flex Peptides, we recognise the importance of precise language in peptide science.

This thorough peptide terminology glossary explains essential peptide science terms to help researchers across the UK navigate complex definitions and processes with confidence. Here, you will find reliable, science-led explanations specifically for those engaged in UK-based peptide research. Whether you are new to the field or looking to deepen your knowledge, this glossary provides clarity and understanding you can trust.

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BPC-157 (Body Protection Compound-157)

  • Description: A pentadecapeptide made up of 15 amino acids, derived from a sequence in human gastric juice.
  • Research Focus: Explored in laboratory environments for its role in angiogenesis pathways and its influence on the nitric oxide system during wound healing studies.
  • Literature Note: In research, BPC-157 commonly supports investigations of fibroblast migration and growth factor receptor expression in vitro.

GHK-Cu (Copper Peptide)

  • Description: A naturally occurring tripeptide (glycyl-L-histidyl-L-lysine) that exhibits a high affinity for copper.
  • Research Focus: Central to research in extracellular matrix (ECM) modulation, especially in monitoring collagen and elastin synthesis within UK-based cell culture models.
  • Mechanism: Functions as a signalling peptide controlling genes involved in DNA repair and antioxidant defence.

Tirzepatide & Retatrutide

  • Description: Laboratory-created polypeptides in the incretin mimetic category.
  • Research Focus: Important in metabolic research, with Tirzepatide acting as a dual GIP/GLP-1 receptor agonist and Retatrutide as a triple agonist (GIP/GLP-1/Glucagon).
  • In-Vitro Use: Widely used in the UK to investigate insulin secretion and lipid metabolism in fat cell cultures. Strictly for research only.

 

MOTS-c

  • Description: A mitochondrial-derived peptide composed of 16 amino acids.
  • Research Focus: Studied in relation to mitochondrial communication and its impact on the nuclear genome.
  • Mechanism: Central to understanding how MOTS-c influences metabolic homeostasis and glucose metabolism during cellular stress.

Bacteriostatic Water

  • Description: Sterile water with 0.9% benzyl alcohol, used as a solvent.
  • Function: Prevents bacterial contamination in laboratory preparations and is an integral part of preparing research solutions in peptide labs across the UK.

Ipamorelin

  • Description: Pentapeptide and selective ghrelin/growth hormone secretagogue receptor agonist.
  • Research Focus: Used to map endocrine signalling and observe receptor binding in controlled in vitro hormone studies.
  • Mechanism: Known for minimal effect on cortisol or ACTH, making it highly valuable for targeted growth hormone investigations.

 

SS-31 (Elamipretide)

  • Description: A small, water-soluble tetrapeptide (D-Arg-dimethylTyr-Lys-Phe-NH2).
  • Research Focus: Used to study mitochondrial function, particularly the stabilisation of cardiolipin within mitochondrial membranes.
  • Mechanism: Explored for its potential to reduce electron leakage during oxidative stress experiments.

Selank

  • Description: Synthetic heptapeptide based on the naturally occurring Tuftsin.
  • Research Focus: Key in neuropharmacology and immunology research conducted throughout the UK.
  • Mechanism: Examined for its ability to influence Interleukin-6 and monoamine neurotransmitter metabolism in cultured cells.

 ​AOD9404

(Advanced Obesity Drug)

  • Description: Laboratory-created polypeptides in the incretin mimetic category.
  • Research Focus: Important in metabolic research, with Tirzepatide acting as a dual GIP/GLP-1 receptor agonist and Retatrutide as a triple agonist (GIP/GLP-1/Glucagon).
  • In-Vitro Use: Widely used in the UK to investigate insulin secretion and lipid metabolism in fat cell cultures. Strictly for research only.

 

KISS PEPTIN-10

  • Description: A decapeptide derivative originating from the Kiss1 gene product.
  • Research Focus: Essential in reproductive endocrine research, particularly for studying GPR54 activation.
  • Mechanism: Commonly used to trigger and study gonadotropin-releasing hormone neuron activity in laboratory cultures.

Tesamorelin

  • Description: A stable analogue of growth hormone-releasing factor (GRF).
  • Research Focus: Applied to study gene expression within the pituitary gland.
  • Mechanism: Stimulates growth hormone production from pituitary somatotroph cells for investigative study in laboratory environments.

 ​L-Carnitine & Glutathione

  • Description: Naturally occurring compounds,a quaternary ammonium compound (L-Carnitine) and a tripeptide (Glutathione).
  • Research Focus: Employed as positive controls in antioxidant and lipid transport assays.
  • Mechanism: Glutathione assesses cellular redox state, while L-Carnitine is examined for its role in fatty acid transport in mitochondrial research.

 

Acetic Acid Water (0.6%)

  • Description: A diluted aqueous solution containing 0.6% acetic acid (CH₃COOH).
  • Function: Used in the reconstitution of IGF-1 and select long-chain peptides prone to instability in neutral solutions.
  • Usage: Vital laboratory solvent for enhancing peptide stability during extended storage in the UK.

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 Research Only - Disclaimer

All materials supplied by Flex Peptides are strictly intended for in‑vitro laboratory research purposes only. These products must not be used for human or animal consumption, or for any diagnostic or therapeutic applications. Always handle with appropriate personal protective equipment (PPE), and only within controlled laboratory environments.

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