What percentage of a2 produces anti a1?

While about 20% of Caucasian blood group A or AB individuals are A2 or A2B, respectively, only about 1-2% of A2 individuals produce a naturally occurring anti-A1 whereas 22-26% of A2B individuals demonstrate an anti-A1.Click to see full answer. Also question is, is a2 positive blood group rare?80% of blood group A and AB persons are subtype A1 and A1B, respectively. The occurrence of A2 subgroup is rare in the Asian population and hence, A2 and A2B blood groups are the rare blood types amongst Asians. The African and Caucasian populations also show a lower frequency of the blood group A2B.Additionally, what is anti a1? Anti-A1 Lectin. Intended use: This anti-A1 reagent is an extract from the seeds of Dolichos biflorus and can be used to differentiate A1 human red cells from other subgroups of A when tested by the tube technique. Similarly one may ask, what percentage of the Type A population are a1? Introduction. Landsteiner ABO system of blood groups is most important for transfusion medicine and has subtypes of A Antigen, A1 and A2, upon which further groups of A and AB have been classified. Of individuals with A antigen, approximately 20% belong to A2 while rest 80% belong to A1.Is anti a1 clinically significant?Abstract. Anti-A1 antibody found in A2 and A2B patients binds A1 cells. In most cases, anti-A1 is of no clinical significance, reacting well below body temperature, and is merely a laboratory nuisance causing ABO discrepancies.