Method for extracting tremella polysaccharide and tremella protein
A technology of tremella polysaccharide and tremella protein is applied in the field of bioengineering to achieve the effects of easy engineering amplification, continuous realization and good economic effect
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Embodiment 1
[0041] The strain used in this example is Tremella fuciformis CICC50180, purchased from China Industrial Microorganism Culture Collection and Management Center.
[0042] A method for extracting tremella polysaccharide and tremella protein using a two-phase system, comprising the following steps:
[0043] (1) Inoculate Tremella fungus on the slant medium, activate and cultivate it at 25°C for 7 days, then wash the spores and mycelium on the slant medium with 1wt% saline, and insert it into 10mL liquid seed medium in 150r / min and 25°C for 4 days to produce liquid seeds; put the liquid seeds into the liquid fermentation medium at an inoculum size of 10wt%, and cultivate them for 5 days at a temperature of 25°C and 180r / min to produce get fermentation broth;
[0044] (2) Concentrate the fermented liquid prepared in step (1) through an ultrafiltration membrane with a molecular weight cut-off of 4000 Dal under the condition of 0.2 MPa, and collect the retentate, which is a concentr...
Embodiment 2
[0053] Utilize the method for extracting Tremella polysaccharide and protein as described in Example 1, the difference is:
[0054] In step (3), 100 mL of disodium hydrogen phosphate aqueous solution was prepared, and polyethylene glycol was added to the solution so that the mass percent concentration of disodium hydrogen phosphate in the total system was 13%, and the concentration of polyethylene glycol in the total system was The mass percentage concentration is 27%, and the mixture is evenly mixed to obtain a polyethylene glycol / disodium hydrogen phosphate two-phase aqueous system.
[0055] Tremella polysaccharide product 3.25g was obtained, the polysaccharide content was determined to be 69.24%; tremella protein 0.37g was obtained.
Embodiment 3
[0057] Utilize the method for extracting Tremella polysaccharide and protein as described in Example 1, the difference is:
[0058] In step (3), sodium chloride and polyethylene glycol were added to 100 mL of water to establish a polyethylene glycol / sodium chloride two-phase aqueous system, so that the mass concentration of polyethylene glycol in the total system was 13%, The mass concentration of sodium chloride in the total system is 27%;
[0059] In step (4), add the prepared polyethylene glycol / sodium chloride two-phase aqueous system to the prepared tremella spore crushing liquid at a volume ratio of 1:1.5, and stir and extract.
[0060] 3.68g tremella polysaccharide product was obtained, and the polysaccharide content was determined to be 74.67%; 0.29g tremella protein product was obtained.
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