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

Crossing File	Backbone Overlay
1db3_A	1db3_A_sse
1dbh_A	1dbh_A_sse
1dbq_A	1dbq_A_sse
1dbt_A	1dbt_A_sse
1dbw_A	1dbw_A_sse
1dbx_A	1dbx_A_sse