The original peptide antibiotics are also biosynthesized and extracted from the culture of polymyxa or aeruginosa. Another synthetic method of peptides is chemical synthesis, which is divided into liquid phase chemical synthesis and solid phase chemical synthesis. The liquid phase method is mainly used for the synthesis of short peptides. The solid phase synthesis method can be used to prepare long-chain peptides, cyclic peptides, and complex. Peptide. The solid phase method is divided into a Boc method and an Fmoc method. It requires the solid phase synthesis of the carrier to achieve the growth of the peptide chain by means of stepwise amino acid condensation. The advantages of solid phase synthesis are ease of purification, shortening of the synthesis cycle, and ease of automation.

Solid phase peptide synthesis(SPPS) support consists of small, polymeric resin beads functionalized with reactive group such as amine or hydroxyl groups, which link to systhesis peptide chain step by step.

Solid phase peptide synthesis(SPPS) resins is insoluble in all common solvents but swells well in most organic solvents. Better swelling degree is benefit for the reaction yields, but for short peptide easy to synthesis, lower swelling degree will be suitable and it will be good at saving solvent.

Solid phase peptide synthesis Resins are rich in variety, complete in specifications and stable in performance.