GSM5903602: WT_IgECL_ATAC rep2; Homo sapiens; ATAC-seq
Briefly, 50,000 HSMCs that were either untreated or treated with IgE receptor crosslinking were spin down and washed with cold PBS once. Then the cells were resuspended in 50 uL cold ATAC-RSB-lysis buffer (10mM Tris-HCl pH 7.4, 10mM NaCl, 3mM MgCl2, 0.1% NP-40, 0.1% Tween-20 and 0.01% Digitonin) and incubated for 3 minutes. The lysis buffer was immediately washed out with 1 mL ATAC-RSB buffer (10mM Tris-HCl pH 7.4, 10mM NaCl, 3mM MgCl2 and 0.1% Tween-20). The cell pellet was resuspended in 50 ul transposition mixture (25 uL 2X TD buffer, 2.5 uL transposase (Illumina, FC-121-1030), 16.5 uL PBS, 0.5 uL 1% digitonin, 0.5 uL 10% Tween-20, 5 uL H2O) and incubated at 37 C for 30 minutes. The reaction was stopped by adding 2.5 uL of 0.5M EDTA pH 8 and transposed DNA was purified using Qiagen MiniElute PCR purification kit (Qiagen). Purified DNA was amplified using the following condition: 72℃ for 5 min, 98 ℃ for 30 s, and 7 cycles: 98 ℃ for 10 s, 63 ℃ for 30 s, 72 ℃ for 1 min. The amplified libraries were cleaned up, size-selected, and the quality and quantity of libraries were assessed on 4150 TapeStation System (Agilent, CA).