Cyclization
Cyclization refers to the formation of a ring structure in a peptide, converting a linear chain into a cyclic molecule. This can occur through several chemical strategies: head-to-tail (N-terminus to C-terminus bond), side-chain-to-side-chain linkages, or disulfide bridges between cysteine residues.
MT-II (Melanotan II) is a cyclic peptide — its ring structure is formed by a lactam bridge. Cyclization generally increases resistance to enzymatic degradation because exopeptidases (which cleave from chain termini) cannot access the cyclic backbone. This often extends the compound's stability in biological media.
Cyclic peptides frequently exhibit more defined three-dimensional structures than their linear counterparts, which can influence receptor binding selectivity and affinity.
All Healthy Aminos products are for research use only.
Related Products
Related Terms
Disulfide Bridge
A covalent bond formed between the sulfur atoms of two cysteine residues, creating structural cross-links that stabilize peptide conformation.
Amidation
The conversion of a peptide's C-terminal carboxyl group to an amide group (-CONH2), often increasing stability and receptor binding.
Half-Life
The time required for the concentration of a compound to decrease by 50%, a key pharmacokinetic parameter in peptide research.
Peptide Bond
A covalent chemical bond formed between the carboxyl group of one amino acid and the amino group of another through a condensation reaction, linking amino acids into chains.
Research Use Only
FOR RESEARCH USE ONLY. Products sold by Healthy Aminos are intended strictly for in-vitro research and laboratory use. Not for human or animal consumption. Not FDA approved. By purchasing from Healthy Aminos, the buyer acknowledges that these products are not intended to diagnose, treat, cure, or prevent any disease. All products are sold as reference standards and research chemicals only.