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

Crossing File	Backbone Overlay
1pn0_A	1pn0_A_sse
1pn2_A	1pn2_A_sse
1pn5_A	1pn5_A_sse
1pnb_A	1pnb_A_sse
1pnb_B	1pnb_B_sse
1pne	1pne_sse