What is a multiepitope peptide?
A multiepitope peptide is a sequence-defined construct containing two or more different epitope or functional peptide sequences. It may be linear, branched, MAP-based or conjugated to another component.
How is a multiepitope peptide different from a MAP peptide?
A conventional MAP peptide commonly presents several copies of one epitope on a lysine scaffold. A multiepitope peptide combines different epitopes, although a MAP scaffold may also be adapted to display different sequences.
Why use a multiepitope peptide instead of several individual peptides?
A multiepitope construct can combine several targets in one defined molecule, simplify handling and enable controlled order, spacing and functionalization. Separate peptides may still be preferable when each epitope must be tested independently or supplied as a pool.
Can adjuvant, targeting or imaging components be incorporated?
Peptide adjuvants, targeting sequences, lipids, PEG, fluorophores, affinity tags and conjugation handles may be incorporated when compatible with the design and synthesis strategy.
How are difficult multiepitope constructs purified?
Purification is selected according to size, charge, hydrophobicity and heterogeneity. Preparative RP-HPLC may be combined with ion-exchange or size-based methods where appropriate.
What analytical methods are available?
Typical characterization may include analytical HPLC/UPLC and mass spectrometry. Additional methods are selected according to construct size, composition and intended use.
What information is needed for a quotation?
Provide the complete sequence or epitope list, desired order or architecture, linkers, modifications, quantity, purity target, analytical requirements and intended application.
Can Bio-Synthesis support scale-up and preclinical research?
Yes. Projects can be reviewed from research quantities through larger custom manufacturing, with scale-appropriate synthesis, purification, documentation and analytical planning.
How many epitopes can be combined in one construct?
There is no fixed maximum number of epitopes that can be incorporated into a multiepitope construct. Practical limits are determined by overall sequence length, amino acid composition, molecular architecture, modifications, purification strategy, and analytical feasibility. Long or compositionally difficult designs may be divided, branched, or assembled using alternative synthetic strategies.
Can B-cell and T-cell epitopes be combined?
Yes. B-cell, helper T-cell and cytotoxic T-cell epitopes can be combined, subject to sequence, linker, processing and synthesis feasibility review.
How should the epitopes be linked?
Flexible, rigid, protease-sensitive or application-specific linkers may be used. The choice depends on accessibility, processing, solubility and the intended biological readout.
Can multiepitope peptides be branched?
Yes. Defined branch points can display different epitope arms and may reduce the need for one very long linear sequence.