This function returns a
graph object representing the nested
structure of chromosome bands (also known as cytogenetic bands).
The nodes of the graph are band identifiers. Each node has a
geneIds node attribute that lists the gene IDs that are
annotated at the band (the gene IDs will be Entrez IDs in most
A string giving the annotation source. For example,
A vector of gene IDs (these should be Entrez IDs for
most annotation sources). The annotations
attached to the graph will be limited to those specified by
This function parses the data stored in the
<chip>MAP map from the appropriate annotation data package.
Although cytogenetic bands are observed in all organisms, currently,
only human and mouse band nomenclatures are supported.
graph-class instance. The graph will be a
tree and the root node is labeled for the organism.
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