title: GSM5596060: Input-O7-M_FKDL210126323-1a; Mus musculus; ChIP-Seq
library_construction_protocol: Lysates were clarified from sonicated nuclei and histone-DNA complexes were isolated with antibody. Libraries were prepared according to the TruePrep® DNA Library Prep Kit V2 for Illumina (TD503-02). Briefly, TruePrep Tagment Enzyme Mix (TTEMix) contains transposase and two kinds of adapters (Adapter 1 and Adapter 2) with equal molar. Input DNA are fragmented and linked with adapters on both ends just by mixing with TTE Mix, followed by a 10-minute incubation at 55℃. The tagged DNA fragments can be further amplified with two pairs of primers N5 (N5XX) / N7 (N7XX) and P5 / P7 (PCR Primer Mix, PPM).  After adapter ligation DNA was PCR amplified with Illumina primers for 15 cycles and library fragments of ~250 bp (insert plus adaptor and PCR primer sequences) were band isolated from an agarose gel. The purified DNA was captured on an Illumina flow cell for cluster generation. Libraries were sequenced on the Illumina HiSeq X following the manufacturer's protocols.