Mannanases and recombinant expression bacterial strain thereof
A technology of mannanase and engineering bacteria, which is applied in the field of microbial engineering and can solve problems such as intolerance to pepsin
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[0026] The method of the present invention will be further explained below in conjunction with examples. The experimental methods without specific conditions in the examples can usually be under conventional conditions, as described in the "Molecular Cloning Experiment Guide" compiled by J. Sambrook (Sambrook) et al. Or run under the conditions recommended by the manufacturer. Those skilled in the art can better understand and master the present invention with the help of the embodiments. However, the protection and scope of the claims of the present invention are not limited to the cases provided.
[0027] 1 Cloning of the mannanase gene from Penicillium decumbens
[0028] 1.1 Extraction of total DNA
[0029] Culture Penicillium decumberns (P. decumberns) overnight, place an appropriate amount of bacteria in a centrifuge tube, centrifuge at 13000 rpm for 5 min, discard the supernatant; add 400μl extraction buffer (100 mM Tris-HCl, 100 mM EDTA, 250 mM NaCl, 1% SDS); then add 100mg...
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