HOMER for Analysis of Hi-C Data and Assessment of Composite Structure of the X Chromosome.

Hi-C reads, which represent ligation events between different regions of the genome, must be processed into matrices of interaction frequencies for downstream analysis. Here, I describe a procedure for mapping Hi-C reads to the genome and conversion of mapped reads into the HOMER tag directory format and interaction matrix format for visualization with Juicebox. The method is demonstrated for the mouse composite X chromosome in which reads from the active and inactive X chromosomes are combined after mock DMSO treatment or targeted degradation of cohesin.