The prevalence of the<unk>  antigen exceeds 99.9% in most populations. The frequency of the<unk> -negative<unk>  type is estimated at 1 in 50,000 in Japanese populations, 1 in 20,000 in Caucasians, and 1 in 1,500 in black people from South Africa.
Lan blood group system
Sid blood group system
Junior blood group system
Hh blood group
Rh blood group system
Augustine blood group system
P1PK blood group system
Vel blood group