Method for detecting karyon DNA (deoxyribonucleic acid) and mitochondrion DNA methylation levels of corn through high-performance liquid chromatography
A high-performance liquid chromatography and cell nucleus technology, which is applied to the detection of corn nuclear DNA and mitochondrial DNA methylation levels, can solve the problems of cumbersome experiments and the inability of three enzymes to act at the same time
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[0012] The present invention will be described in detail below with reference to specific embodiments.
[0013] DNA samples are hydrolyzed into bases / nucleosides / nucleotides by acid or enzyme. In this experiment, Benzonase, phosphodiesterase and alkaline phosphatase are used to prepare a hydrolysis mixture, which can be prepared for 100 parts of 1μg DNA hydrolysis mixture The method is as follows: 250U Benzonase, 300mU Phosphodiesterase I, and 200U Alkaline Phosphatase are added into 5mL Tris-HCl hydrolysis buffer with pH 7.9.
[0014] Add 50 μL of the hydrolysis mixture to 1 μg of 20 ng / μL DNA, incubate at 37 °C for 6 hours, and refrigerate at -20 °C for measurement. Start the computer, pump A, pump B, SPD detector, column thermostat, etc. of the high performance liquid chromatograph, first rinse the column with 100% methanol for 1 hour, then transition with water: methanol (95:5, v / v) for 30 minutes, and finally Rinse with buffered mobile phase for 1 h, and equilibrate the ...
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