Preparation and method of immunoregulatory peptide
An immune regulation and immune polypeptide technology, applied in the biological field, can solve the problem of no relevant reports on the preparation of polypeptides, and achieve the effects of simple and efficient enzymatic hydrolysis technology and avoiding cost waste.
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[0023] The amino acid sequence of the immunomodulatory peptide of the present invention is Arg-Gly-Pro-Pro-Pro.
[0024] The preparation method is as follows:
[0025] Step 1: Grind Pseudostellariae Radix Pseudostellariae into powder with a traditional Chinese medicine grinder, pass through a 60-mesh sieve; weigh 5.0 g Pseudostellariae Pseudostellariae powder, add 105 mL of 0.27 mol / L sodium hydroxide solution, and extract at 52.1 °C for 1 h, 10,000 After centrifuging at rpm for 20 min, take the supernatant, adjust the pH to 3.0 with 1 mol / L hydrochloric acid, let it stand for 1 h, centrifuge at 5,000 rpm for 20 min, take the precipitate, and freeze-dry it to obtain Pseudostellaria protein.
[0026] Step 2: Weigh 10.0 g of Pseudostellariae protein, add 100 mL of deionized water, adjust the pH to 2.0, add 0.8 g of pepsin, place it at 37 °C for 5.0 h, adjust the pH to 7.0, add 0.8 g of pancreatic Protease, hydrolyzed at 37 ℃ for 3.0 h, boiled in a boiling water bath for 10 min ...
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