Despite the high sequence identity among LHB/CGB genes, there are signs of functional differentiation among the gene copies.     ///    "Across the orthologous regions of LHB/CGB cluster, substitutions and indels contributed approximately equally to the interspecies divergence and the distribution of nucleotide identity was correlated with the regional repeat content. "    ///    "We shotgun sequenced and compared the human (45,165 bp) and chimpanzee (39,876 bp) LHB/CGB regions and hereby present evidence for structural variation resulting in discordant number of CGB genes (6 in human, 5 in chimpanzee). "    ///    Intraspecies gene conversion may have shaped the LHB/CGB gene cluster. 