The non-A alleles of hPRDM9. (A) From hPRDM9A, a single amino acid substitution at ZnF10 and ZnF11 resulted in alleles L9/L24, L20, or L13, respectively. (B) Comparison of DNA-binding affinities by different alleles (in the context of ZnF8–12) with the oligo containing the hot spot THE1B sequence. (C) A single base pair change at THE1B (from T:A to C:G) resulted in stronger binding by the N789H variant (allele L20). (D,E) Comparison of DNA-binding affinities by different alleles (in the context of ZnF8–12) with oligos containing hot spot sequences (MSTM1a and MSTM1b).