African SNPs in the enhancer region of the LCT gene, in intron 13 of the MCM6 gene [3, 8, 9, 16, 37]. Red colour points to the region of origin of samples in Mali (in black). Arrows represent suggested patterns of spread of the mutations. Without haplotype analyses between different populations, distinguishing original mutations from those that have spread between populations is not possible. Double arrow represents the fact that the original location of T/G-13915 cannot be determined, although it has been found in Arabic populations as well as in the Fulani of Mali (this study).