High-nucleic-acid baker's yeast and preparation method thereof
A baker's yeast and baker's yeast technology, applied in biochemical equipment and methods, microorganism-based methods, fungi, etc., can solve the problem of affecting the content of high nucleic acid yeast, yeast nucleic acid yield not reaching the expected effect, and progeny yeast nucleic acid. Content differences and other issues, to achieve the effect of improving purity, increasing nucleic acid content, and promoting expression
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[0015] Example 1
[0016] A high-nucleic acid baker's yeast, relative to 100% by weight of baker's yeast cell, contains more than 21% by weight of nucleic acid, and the weight of RNA is more than 13%.
[0017] A preparation method of high nucleic acid baker's yeast, specifically according to the following steps:
[0018] S1: Activate the yeast cells, place the frozen yeast strains in a sterile room, and dissolve them naturally at room temperature, then transfer the yeast liquid to the liquid culture medium, and conduct activation culture in a constant temperature incubator at 34~38℃ for 18 hours ;
[0019] S2: Screen the dominant bacteria, use a low-speed centrifuge, divide the yeast liquid into a 50ml test tube, centrifuge at a low speed of 200r / min for 5 minutes, collect the bacteria gathered at the bottom of the test tube, and place the bacteria in the liquid medium Shake gently, continue culturing for 18 hours and then repeat the low-speed centrifugation to obtain the dominant ye...
Example Embodiment
[0024] Example 2
[0025] A high-nucleic acid baker's yeast, relative to 100% by weight of baker's yeast cell, contains more than 21% by weight of nucleic acid, and the weight of RNA is more than 13%.
[0026] A preparation method of high nucleic acid baker's yeast, specifically according to the following steps:
[0027] S1: Activate the yeast cells, place the frozen yeast strains in a sterile room, and dissolve them naturally at room temperature, then transfer the yeast liquid to the liquid culture medium, and conduct activation culture in a constant temperature incubator at 36°C for 24 hours;
[0028] S2: Screen the dominant bacteria, use a low-speed centrifuge, divide the yeast liquid into a 50ml test tube, centrifuge at a low speed of 250r / min for 5 minutes, collect the bacteria gathered at the bottom of the test tube, and place the bacteria in the liquid medium Shake gently, continue culturing for 24 hours and then repeat low-speed centrifugation to obtain the dominant yeast cell...
Example Embodiment
[0033] Example 3
[0034] A high-nucleic acid baker's yeast, relative to 100% by weight of baker's yeast cell, contains more than 21% by weight of nucleic acid, and the weight of RNA is more than 13%.
[0035] A preparation method of high nucleic acid baker's yeast, specifically according to the following steps:
[0036] S1: Activate the yeast cells, place the frozen yeast strains in a sterile room, and dissolve them naturally at room temperature, then transfer the yeast liquid to the liquid culture medium, and conduct activation culture in a constant temperature incubator at 38°C for 28 hours;
[0037] S2: Screen the dominant bacteria, use a low-speed centrifuge, divide the yeast liquid into a 50ml test tube, centrifuge at a low speed of 300r / min for 5 minutes, collect the bacteria gathered at the bottom of the test tube, and place the bacteria in the liquid medium Shake gently, continue culturing for 28 hours and then repeat the low-speed centrifugation to obtain the dominant yeast ...
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