GSM8031269
The CUT&Tag assay was performed using the Hyperactive Universal CUT&Tag Assay Kit for Illumina (Vazyme Biotech, #TD903) following the manufacturers protocol. For library amplification, 15 μl of purified DNA was mixed with 25 μl of 2× CAM, along with 5 μl of uniquely barcoded i5 and i7 primers from the TruePrep Index Kit V2 for Illumina (Vazyme Biotech, # TD202). A total volume of 50 μl of sample was placed in a thermal cycler using the following program: 72 °C for 3 min; 98 °C for 3 min; 12–16 cycles of 98 °C for 10 s, 60 °C for 5 s, and 72°C for 1 min; and holding at 12 °C. To purify the PCR products, 2× volumes of VAHTS DNA Clean Beads (Vazyme Biotech, #N411) were added and incubated at room temperature for 5 min. The beads were washed twice with 200 μl fresh 80% ethanol and eluted in 22 μl ddH2O.