A method for multiple amplification library construction for trace dna and its special kit
A technology of multiple amplification and DNA library, which is applied in the field of multiple amplification library construction method and its special kit, which can solve the problems of high indel detection error rate, non-universal library construction products, cumbersome steps, etc., to reduce sequencing background errors , improve sequencing quality, and facilitate operation
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Embodiment 1
[0064] Example 1. The sequencing linker of the present invention and its application in building a trace DNA library.
[0065] 1. The sequencing adapter of the present invention
[0066] 1. Preparation of adapter sequences
[0067] Prepare the linker sequence as follows:
[0068]adoligo1: T*A*A*TA*CACTCTTTCCCTACACGACGCTCTTCCG*A*T*C*T(sequence 1);
[0069] adoligo2: G*C*C*T*GTGACTGGAGTTCAGACGTGTGCTCTTCCG*A*T*C*T (sequence 2);
[0070] adlogo3: A*G*A*T*CGGAA*G*A*G*C (sequence 3);
[0071] Among them, * indicates thio modification.
[0072] 2. Preparation of Adaptor1 and Adaptor2 linkers
[0073] (1) Prepare adoligo1, adoligo2, and adoligo3 respectively into storage solutions with a final concentration of 500 μM.
[0074] (2) Mix adoligo1 and adoligo3 in equal molar numbers, configure the reaction system shown in Table 1, and react according to the procedure shown in Table 3 to form Adaptor1.
[0075] Mix adoligo2 and adoligo3 in equimolar amounts, configure the reaction s...
Embodiment 2
[0155] Embodiment 2, the fidelity comparison between the amplification library construction system of the present invention and the Ampliseq kit
[0156] The cfDNA quality control products with a mutation frequency of 5%, 1% and 0.5% (the cfDNA quality control products with a mutation frequency of 5% and 1% were purchased from Horizon Discovery Company in the United States, and the cfDNA quality control products with a mutation frequency of 0.5% The cfDNA quality control products with a mutation frequency of 0% and 1% purchased from Horizon Discovery in the United States were mixed and prepared according to the mass ratio of 1:1) as the samples to be tested, and the amplification library construction system of the present invention and Ampliseq were used respectively. The kit was used for amplification and library construction, and the fidelity of the two methods was compared. Specific steps are as follows:
[0157] 1. Construction of library
[0158] (1) Amplification libra...
Embodiment 3
[0177] Example 3, Multiple amplification at the single cell level and method for building a library
[0178] In this embodiment, 12 pg of gDNA at the single-cell level is used as a starting template to amplify and build a library (the preparation method of gDNA at the single-cell level is as follows: the fragmented human genome gDNA is fragmented with an ultrasonic breaker to obtain an average of 200 bp left and right fragmented human genome gDNA, which is then serially diluted to obtain gDNA at the single-cell level), and the amplification performance of the amplification library construction system of the present invention on picogram-level samples is tested. Specific steps are as follows:
[0179] 1. Multiple amplification of DNA at the single cell level
[0180] (1) Configure the amplification reaction system according to Table 4, blow and mix evenly, and centrifuge briefly to collect the liquid.
[0181] (2) Place it on the PCR instrument and run the program in Table 5....
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