We analyzed the genetic polymorphism of eight red cell enzymes in samples from different geographical areas of Tenerife and the Iberian peninsula. The gene frequency heterogeneity found within the Tenerife samples was at the same level as that of Tenerife-mainland comparisons. The presence of the Negroid G6 PD A+ allele in the Tenerife samples is evidence of an African admixture with a mean estimation of 4.5%.
Afonso, J. M.; Hernández, M.; Larruga, J. M.; Cabrera, V. M.; and González, A. M.
"Human Enzyme Polymorphism in the Canary Islands. III. Tenerife Island Population,"
4, Article 6.
Available at: https://digitalcommons.wayne.edu/humbiol/vol61/iss4/6