The cited paper was immediately followed in the same issue of Science by: John Misasi, Morgan A. Gilman, Masaru Kanekiyo et al, "Structural and molecular basis for Ebola virus neutralization by protective human antibodies," Science, 351, 1343-1346. This paper illustrates crystal structures at 2Å resolution of the Ebola viral epitopes that are being recognized and targeted by monoclonal antibodies from a particular human survivor of the 1995 Kikwit (Congo) Ebola outbreak, who happened to mount an unusual and very robust and potent immune response.

(Thanks to Juan Weiss for this reference and its interpretation.)