seqinfo: A Seqinfo object containing basic information about the genome used. Alternatively, the name of a UCSC genome can be provided and the sequence information will be downloaded from UCSC.
annotation: Genomic annotation
motifs: A Motif object
fragments: A list of Fragment objects
bias: Tn5 integration bias matrix
positionEnrichment: A named list of position enrichment matrices.
sep: Characters used to separate the chromosome, start, and end coordinates in the row names of the data matrix