Search for human AS layers in various primates.

In the ��Primate�� column after the name of the primate and/or primate group, the youngest major L1 repeat shared with humans (in parentheses; our data) and the proposed age of the taxon [32] in million years (myr) are indicated. In other columns, the AS layer, the oldest L1 repeat found in the layer (in parentheses; our data), and the age of this L1 repeat estimated using mutation rate of 0.216% per myr [31] are indicated. In the new HOR arrays, L1 repeats are not present in significant numbers [2]. The presence of AS layers in certain species is indicated by ��+��.