Get and set indices of homologous antigens to sera in an antigenic map
srHomologousAgs(map)
srHomologousAgs(map) <- valueAn acmap object
A list, where each entry is a vector of indices for homologous antigens, or a length 0 vector where no homologous antigen is present
A list, where each entry is a vector of indices for homologous antigens, or a length 0 vector where no homologous antigen is present.
Other antigen and sera attribute functions: 
agAttributes,
agGroups(),
agHomologousSr(),
agLabIDs(),
agSequences(),
ptAnnotations,
ptClades,
srAttributes,
srGroups(),
srSequences()