We had sequence data for four strains of Marburg virus, both the actual draft and the finished versions of those same isolates, provided for these analyses by a colleague working at Lawrence Livermore National Laboratory. The draft sequence was of $3· to 6· coverage, which enabled us to compare SAP results using the same strains in finished form. The identities of these sequences are provided in the Appendix. For the draft Marburg analyses, we selected one finished strain, the reference strain from GenBank (gi|13489275|ref|NC_001608.2|