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“We have characterized eight dinucleotide (dC-dA)n.(dG-dT)n repeat loci located on human chromosome 13q in eight human populations and in a sample of chimpanzees. Even though there is substantial variation in allele frequencie at each locus, at a given locus the most frequent alleles are shared by all human populations. … The microsatellite loci examined here are present and, with the exception of the locus D13S197, are polymorphic in the chimpanzees, showing an overlapping distribution of allele sizes with those observed in human populations.”
This study compares the genetic distances of eight human populations (Samoans, North Amerindians, South Amerindians, New Guineans, Kachari [Mongolids], Germans, more generalized Caucasians, and Sokoto: sub-Saharan Africans from Nigeria) to each other and to chimpanzees. The data were analyzed two ways - with Nei's standard genetic distance, and with modified Cavalli-Sforza distance.
Using Nei's method, the Nigerian-chimp distance was 1.334 +/- 0.375, by far the closest value. By the Cavalli-Sforza method, the Sokoto Nigerians were again the closest to chimps (0.539) by a large margin. The farthest were again the South Amerindians (0.712), with the Germans (0.680) and general Caucasians (0.667) being a very close third and fourth behind the South Amerindians as well as Samoans (0.711) and North Amerindians (0.697). So, while the two methods give slightly different orders, in both cases the Nigerians are by far the closest group to the chimps. Once again, given the first method, these sub-Saharan Africans were at 1.334 while all the other groups ranged from 1.527-1.901, and given the second method they were at 0.539 while the other groups ranged from 0.643 (Kachari again) to 0.712.
http://www.ncbi.nlm.nih.gov/pubmed/7847383
