The allele distribution of two STRs has been investigated in two populations, i.e. Turks (n = 203/200) and Germans (n = 414/402). The Turkish population showed 11 alleles in HumFES/FPS and 6 alleles in HumF13B while the German population had 9 (FES) and 8 (F13B) alleles respectively. Although the frequency profiles looked quite similiar in both populations, there exist significant differences mainly due to alleles 8 and 10 (F13B) and allele 12 (FES). Four variant alleles have been sequenced and are described. Investigation of 368 (FES)/372 (F13B) meioses revealed no new mutations.