TriMethyl-Histone H3 (Lys14) R

组蛋白 Histone Protein

组蛋白是和染色体相联的最主要的蛋白质。它的作用是和染色体中的 DNA 的负电荷结合。组蛋白是比较小的碱性蛋白；在细胞正常 pH 值时，组蛋白带有正电荷，这样它们就可以和 DNA 结合，这个正电荷主要存在于碱性氨基酸 Lys 和 Arg 的 -NH3 上。其实，组蛋白约含 25% 的 Arg 和 Lys 。比其他蛋白的 Arg ， Lys 的含量都多。和真核 DNA 结合的有 5 种类型的组蛋白： H1 ， H2A ， H2B ， H3

RNA-biotin based pulldown assays for the detection of siRNA targeted genomic regions and siRNA directed histone modifications (PROT32)

upon the dual pulldown to incorporate a third pulldown which is an iteration of the ChIP and is a pulldown for H3K27me3+ (Figure 1b). The third assay described here is the biotin-RNA pulldown of a low-copy RNA that spans the siRNA targeted promoter region

Competing Chromosomal Proteins from Drosophila Polytene Chromosomes Using Modified Histone Peptides

to chromatin, by its histone tail interaction or by other interactions, then you would not expect to see loss of binding upon peptide competition. A good positive control for the assay is to use H3K9 dimethylated peptide to compete HP1 from the pericentric