EZ-Magna ChIP^®A/G染色质免疫沉淀试剂盒

蛋白质是细胞内部的主要功能分子，负责细胞功能和生存的多种生物学活动。值得关注的是，许多蛋白质也能与DNA发生相互作用。

Protein and nucleic acid interaction reagents and resources for investing protein-RNA, protein-DNA, and protein-protein interactions and associated applications.

Chromatin-immunoprecipitation (ChIP) followed by next generation sequencing (ChIP-seq) of the immunoprecipitated DNA is a powerful tool for the investigation of protein:DNA interactions. To perform ChIP-seq, chromatin is isolated from cells or tissues (with or without chemical crosslinking) and fragmented. Antibodies recognizing chromatinassociated proteins of interest are used to enrich the sample for specific chromatin fragments. The DNA is recovered, sequenced on various NGS platforms, and aligned to a reference genome to determine specific protein binding loci. ChIP-seq studies have increased our knowledge of transcription factor biology, DNA methylation and histone modifications.

Chromatin immunoprecipitation (ChIP) has been widely adapted for the study of gene-specific and genome-wide distribution of specific DNA- and RNA-binding proteins or protein modifications. Similar to standard protein immunoprecipitation assays, ChIP involves isolation of immunocomplexes using a solid medium, such as agarose or magnetic beads, coupled to either IgG binding recombinant protein A or protein G. In a typical ChIP experiment either protein A or G is selected for enrichment depending on the antibody isotype. However, proteins A and G possess differing affinities for human and mouse IgGs. Complicating this choice, for some antibody isotypes there is affinity for both protein A and G. In addition, we have observed that independent of the isotype the affinity of a specific antibody for protein A or G can vary depending on the specific clone, purification method, and source.