This file points to 6 pairs of files of the form    "?na*"
("?" is a single-character wildcard and "*" is a multiple-character wildcard.)

Crossing File	Backbone Overlay
1na6_A	1na6_A_sse
1naq_A	1naq_A_sse
1nar	1nar_sse
1nat	1nat_sse
2nac_A	2nac_A_sse
2nap_A	2nap_A_sse