Heterodimer
Heterodimer — A dimer composed of two different subunits, as seen in insulin (A-chain and B-chain linked by disulfide bonds).
What Is a Heterodimer?
A heterodimer is a complex of two different peptide or protein subunits. Many biological receptors (integrins α/β, GPCR heterodimers) and hormones (insulin A+B chains) function as heterodimers. Designing heterodimeric peptides enables bispecific targeting of two different receptors or epitopes simultaneously.
Examples
- Insulin: Heterodimer of A chain (21 AA) + B chain (30 AA) linked by 2 disulfide bonds
- Bispecific peptides: Two different targeting peptides connected by a linker for dual-receptor engagement
- Integrins: Always function as α/β heterodimers. 24 combinations in humans
Frequently Asked Questions
What is Heterodimer?
A dimer composed of two different subunits, as seen in insulin (A-chain and B-chain linked by disulfide bonds).
Why is Heterodimer important in peptide research?
Heterodimer is a fundamental concept in structure as it relates to peptide science. It directly influences experimental design, compound characterization, and the reliability of research outcomes across biochemistry and molecular biology disciplines.