Metabolic Programming, School of Life Sciences Weihenstephan, ZIEL-Institute for Food & Health, Technische Universitaet Muenchen (TUM), 85354 Freising, Germany.
Institute for Diabetes and Obesity (IDO) & Institute for Diabetes and Cancer (IDC), Helmholtz Center Munich (HMGU) and German Center for Diabetes Research (DZD), 85764 Neuherberg (Munich), Germany.
STAR Protoc. 2021 Jun 16;2(3):100609. doi: 10.1016/j.xpro.2021.100609. eCollection 2021 Sep 17.
Quantifying differential genome occupancy by chromatin immunoprecipitation (ChIP) remains challenging due to variation in chromatin fragmentation, immunoprecipitation efficiencies, and intertube variability. In this protocol, we add heterologous spike-ins from chromatin as an internal control to the mice chromatin before immunoprecipitation to normalize for technical variation in ChIP-qPCR or ChIP-seq. The choice of spike-in depends on the evolutionary conservation of the protein of interest and the antibody used. For complete details on the use and execution of this protocol, please refer to Greulich et al. (2021).
由于染色质片段化、免疫沉淀效率和管间变异性的差异,通过染色质免疫沉淀(ChIP)定量分析差异基因组占据仍然具有挑战性。在本方案中,我们在免疫沉淀前将来自 染色质的异源 Spike-ins 添加到小鼠染色质中,以 ChIP-qPCR 或 ChIP-seq 的技术变化为内参进行标准化。 Spike-in 的选择取决于感兴趣的蛋白质和所用抗体的进化保守性。有关此方案的使用和执行的完整详细信息,请参阅 Greulich 等人。(2021)。