The cistrome refers to "the set of cis-acting targets of a trans- acting factor on a genome-wide scale, also known as the in vivo genome-wide location of transcription factor binding-sites or histone modifications". The term cistrome is a portmanteau of cistron + genome and was coined by investigators at the Dana-Farber Cancer Institute and Harvard Medical School. This is cistrome-mdseqpos (MDSeqPos), part of the Cistrome- Applications-Harvard project. MDSeqPos depends on the seqLogo R script tool. For details visit https://bioconductor.org/