Illustration of the head to head junction of BvMSat05 arrays. A: The BAC end sequence FN424410 contains a head to head junction of two head to tail BvMSat05 arrays (arrows and double-lined arrows). B: An alignment of ten BAC end sequences illustrates the typical head to head junction of two head to tail arrays. For each array four monomers, which are separated by a gap, are shown. The number at the left and right borders of the arrays corresponds to the number of monomers that are not displayed in this illustration. The nucleotides are color-encoded: Red for adenine, blue for cytosine, yellow for guanine and green for thymine. The tandem arrays are flanked one-sided by a highly conserved 50 bp motif, which comprises two palindromic sequences (double arrows). Identity values are displayed in percent.