xtrhomology             Contains data for genes that are homologous to
                        genes in Xenopus tropicalis
xtrhomologyDATA         Genes that are Homologous to Xenopus tropicalis
xtrhomologyHGID         A vector containing all the HomoloGeneIDs for
                        Xenopus tropicalis
xtrhomologyLL2HGID      Mappings between public database ids and NCBI's
                        Internal HomoloGeneIDs for Xenopus tropicalis
xtrhomologyORGCODE      A data frame for mappings between organism
                        scientific names, NCBI code, and three-letter
                        short names for various organisms
xtrhomologyQC           Quality control information for xtrhomology
