This file points to 4 pairs of files of the form    "?p2*"
("?" is a single-character wildcard and "*" is a multiple-character wildcard.)

Crossing File	Backbone Overlay
1p22_A	1p22_A_sse
1p28_A	1p28_A_sse
1p2f_A	1p2f_A_sse
1p2z_A	1p2z_A_sse