Comparison of MAOB GN repeats among bonobo, chimpanzee and human. Bo bonobo, Ch chimpanzee, Hu human. The number following GN represents the repeat number of GN dinucleotide. In the nucleotide sequence a: the preceding sequence that is common in bonobos, chimpanzees and humans, b: (TG)4 with a T/C SNP in bonobos (boxed), c: common in the three species, d: the GN repeat region, e: CA(GA)4, f: the following sequence that is common in the three species. GenBank accession numbers: human GN24 X63276, GN27 AB302115, chimpanzee GN24 AB302116, GN25 AB2117, bonobo GN20–GN24 AB970521–AB970525AB970521AB970522AB970523AB970524AB970525.