Schematic for the evolution of recently integrated Alu subfamilies. The origin of the Ya5a2 Alu subfamily is shown after the divergence of Ya5 and Yb8 elements. The total number of elements found in the nr-database (perfect matches in parenthesis) are shown first separated by a slash from the total number of elements found in all three databases (nr, gss, htgs). For the Ya5 elements only the nr-database results are shown.