This file points to 3 pairs of files of the form    "?fk*"
("?" is a single-character wildcard and "*" is a multiple-character wildcard.)

Crossing File	Backbone Overlay
1fk5_A	1fk5_A_sse
1fkm_A	1fkm_A_sse
1fkn_A	1fkn_A_sse