There is substantive false reaction of A30 with A*3101, otherwise serological identification is good.
| freq | |||
| ref. | Population | (%) | |
| Colspan = 3 | A31-B35 (A*310102:Cw*0401:B*3501) | ||
| Lakota Sioux (USA) | 4.1 | ||
| Indig American (USA) | 3.7 | ||
| Mestizo (Guad. Mexico) | 1.5[1] | ||
| Tibetan | 1.1 | ||
| Jews (England) | 1.3 | ||
| Tibetan | 1.1 | ||
| Italian | 0.6 | ||
| Japanese | 0.5 | ||
| French | 0.5 | ||
| Choushan (China) | 0.4 | ||
| German | 0.3 | ||
| Colspan = 3 | A31-B39 (A*310102:Cw*0701:B*3901) | ||
| Mixtec (Oax. Mexico) | 10.0 | ||
| Lakota Sioux (USA) | 1.6 | ||
| Japanese | 0.3 | ||
| German | 0.1 | ||
| Colspan = 3 | A31-B48 (A*310102:B*4801) | ||
| Orochon (Russia) | 6.0 | ||
| Maya (Guatemala) | 3.5 | ||
| Buriat | 3.4 | ||
| Japanese | 0.3 | ||
| Colspan = 3 | A31-B51 (A*310102:B*5101) | ||
| Ainu (Hokkaido Japan) | 8.9 | ||
| Indig. Brazil | 5.8 | ||
| Orochon (Russia) | 5.3 | ||
| Indig American (USA) | 4.3 | ||
| Tibetan | 3.3 | ||
| Inner Mongolian | 3.0 | ||
| Japanese | 3.0 | ||
| Portuguese | 1.6 | ||
| Korean | 1.2 | ||
| Italian | 0.9 | ||
| French | 0.5 | ||
| German | 0.3 | ||
| Choushan (China) | 0.2 | ||
| Colspan = 3 | (A*310102:B*5102) | ||
| Tarahumura (Mexico) | 5.7 | ||
| Vietnamese | 1.0 | ||
| Colspan = 3 | A31-B60 (A*310102:Cw*0304:B*4001) | ||
| Lusaka (Zambia) | 2.3 | ||
| Yakuts (Russia) | 2.0 | ||
| Irish | 0.7 | ||
| Choushan (China) | 0.7 | ||
| Japan | 0.6 | ||
| Dutch | 0.6 | ||
| German | 0.4 | ||
| Colspan = 3 | A31-B62 (A*310102:B*1501) | ||
| Nivkhi (Sakalin, Russia) | 12.5 | ||
| Yakut(Russia) | 5.5 | ||
| Indig. Brazil | 4.1 | ||
| Manchu | 1.1 | ||
| Japan | 0.4 | ||
| German | 0.2 | ||
| Choushan (China) | 0.2 |
Examination of A31 haplotypes reveals a probable connection across northern Eurasia during the prehistoric period. Frequencies of the more 'tale-tell' haplotypes (A31-B60, B61, and B62) fall from NE to SW Europe. Other haplotypes appears to have spread from the Middle East (A31-B51 and A31-B35).