Figure 3.

190 SHP types (upper-half of diagonal) and observed frequencies (lower-half of diagonal) are shown. Substitution-homo-pair frequencies (i.e. 20) are at the diagonal position. Both these types and their frequencies divided into three categories: a] HB-HB category: total 36 (upper dark shade), b] HL-HL category: total 55 (lower white shade) and HB-HL category: 99 in number (middle gray shade region). Residue Q is shown by gray-strip for explanation of the calculation of diversity of a given hetero-pair.