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Solid-phase synthesis is a common technique for peptide synthesis.Usually, peptides are synthesised from the carbonyl group side (C-terminus) to amino group side (N-terminus) of the amino acid chain in the SPPS method, although peptides are biologically synthesised in the opposite direction in cells.
Scheme of solid-phase peptides synthesis (SPPS) on a resin as solid support with protected amino acids.The deprotection is usually done using a base such as piperidine.This is followed by a coupling step (a protected amino acid is added) to the growing peptide chain.
Traditionally, solid-phase synthesis has relied on polystyrene-based resins for the synthesis of all kinds of peptides. However, due to their high hydrophobicity, these resins have certain limitations, particularly in the synthesis of complex peptides, and in such cases, polyethylene glycol (PEG)-based resins are often found to give superior ...
The use of Fmoc as a temporary protecting group for amine at the N-terminus in solid phase synthesis is very widespread for Fmoc/tBu approach, because its removal with piperidine does not disturb the acid-labile linker between the peptide and the resin. [7]
The solid support in their case is replaced by the encoding DNA oligomers. This makes it possible to synthesize libraries containing even trillions of components and screen them using affinity binding methods. A different way of carrying out solution-phase S&P synthesis is applying scavenger resins to remove the byproducts.
Combinatorial split-mix (split and pool) synthesis [12] [13] is based on the solid-phase synthesis developed by Merrifield. [14] If a combinatorial peptide library is synthesized using 20 amino acids (or other kinds of building blocks) the bead form solid support is divided into 20 equal portions. This is followed by coupling a different amino ...
Merrifield Resin is a cross-linked polystyrene resin that carries a chloromethyl functional group. Merrifield resin is named after its inventor, Robert Bruce Merrifield (1984 winner of the Nobel Prize in Chemistry), and used in solid-phase synthesis. The material is typically available as white beads.
Within solid phase peptide synthesis (SPPS) there exist two strategies for the synthesis of glycopeptides, linear and convergent assembly. Linear assembly relies on the synthesis of building blocks and then the use of SPPS to attach the building block together. An outline of this approach is illustrated below. Scheme 1.
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